Equipment Guide (Mass Effect 3)

This Equipment Guide details how important collectibles such as weapons, weapon mods, armor, intel, and Citadel mission items can be acquired throughout Mass Effect 3.

Priority: Mars

 * 1) M-92 Mantis: Picked up in front of a dead soldier soon after leaving shuttle. Available to Infiltrators at the start of the mission.
 * 2) Ariake Technologies Gauntlets: Picked up from a shelf in the room with the security console that opens the first door back outside.
 * 3) M-4 Shuriken: Same room as previous. Picked up past console that opens the first door back outside, is located near a med-kit. Available to Adepts and Engineers at the start of the mission.
 * 4) Kassa Fabrications Chestplate: Picked up outside next to a ladder back up.
 * 5) SMG Scope: Located to the right of the bottom of the stairs in the dark cafeteria before reaching the shootable glass windows.
 * 6) SMG Ultralight Materials: In the room with the Weapon Bench behind some boxes.
 * 7) Sniper Rifle Extended Barrel: Found in the sterilization room on a table; angle the sterilizing lasers so that you can reach this item.
 * 8) Shotgun High Caliber Barrel: Found in the sterilization room.
 * 9) M-23 Katana: Located near a dead Cerberus Assault Trooper after the sterilization room. Available to Sentinels, Soldiers, and Vanguards at the start of the mission.
 * 10) Sniper Rifle Concentration Mod: In the tram station control room to the left of the "Auto turret controls" button.
 * 11) M-15 Vindicator: Located at the other end of the tram station, in a closet at the back-left.
 * 12) Shotgun Shredder Mod: Located near the Vindicator, in a closet at the back-right of the other end of the tram station.

Priority: Palaven

 * 1) M-97 Viper: In the middle of the first base on some crates, near a datapad.
 * 2) Pistol Piercing Mod: In a tent neighboring General Corinthus in the same base, in the vicinity of a weapon bench and next to Armax Arsenal shoulder armor.
 * 3) Armax Arsenal Shoulder Armor: Next to the Pistol Piercing Mod above.
 * 4) Assault Rifle Piercing Mod: Past General Corinthus' tent to the other end of where you enter the first base, to the left near the gate behind a barrier next to an M-27 Scimitar.
 * 5) M-27 Scimitar: Next to the Assault Rifle Piercing Mod above.
 * 6) Hahne-Kedar Greaves: In a tent from the opposite end of where you enter the first base.
 * 7) Pistol Magazine Upgrade: Between General Corinthus' tent and a tent with a workbench, Pistol Piercing Mod, Armax Arsenal Shoulder Armor, and a workbench, this mod will be atop of a crate next to a datapad.
 * 8) Assault Rifle Magazine Upgrade: In the airfield after leaving General Corinthus' base for the second time, this mod is located near the center alongside some thermal clips.
 * 9) Sniper Rifle Spare Thermal Clip: After defeating the Brute and wandering down a winding pathway, you will find two soldiers. This mod will be next to one of them.
 * 10) Sniper Rifle Enhanced Scope: In the second camp, head all the way to the left along the wall. Once you reach the other end, look to your right and, in front of a tent next to a medkit, this mod can be found. Make sure to get this item before the end of the fight in the second camp, as the mission will then end automatically and you won't be able to get this item.

Priority: Sur'Kesh

 * 1) Assault Rifle Extended Barrel: After exiting the first cutscene with the female Krogan, turn around and head up the stairs. This will be lying on a shelf between the two doors.
 * 2) Shotgun Blade Attachment: After going back outside, you will encounter a group of enemies. In an alcove to the right after encountering these enemies, this mod will be waiting on a shelf on the wall.
 * 3) Shotgun Spare Thermal Clip: After fighting two groups of enemies, you will enter a room where the passageway is blocked by two plumes of fire. Vaulting the barrier to the left and then jumping over the pit to your right, you can see this mod in a corner to your right.
 * 4) Pistol High-Caliber Barrel: After being shot at by the two enemies standing in an open shuttle, head to your left past the overhang. When you encounter the next group of enemies, hug the left wall, and this mod will be on a shelf.
 * 5) Armax Arsenal Greaves: After standing to be identified by a scanner, you will enter a large room with two floors. Walk straight ahead on the floor you entered from, and this armor will be waiting on top of the first table in front of you.
 * 6) Sentry Interface: In the same room as the Armax Arsenal Greaves, on the same floor, head to the opposite end of the ground floor from where you entered, past the ladder, and head to your left. This armor is lying atop of the bench to your right.
 * 7) M-13 Raptor: After entering the vicinity of the second quarantine checkpoint, head straight onwards from the entrance until you hit the wall. To your right on a bench, near a corpse, is this sniper rifle.
 * 8) Pistol Scope: After entering the vicinity of the second quarantine checkpoint, hug the wall to the left of where you initially enter. This mod is atop of a desk perpendicular to the left wall.
 * 9) Scorpion: After reaching the second quarantine checkpoint, you will need to find a power terminal. In the same red room as the power terminal, on the opposite wall from the terminal on the ground, you can find this pistol.

Priority: Tuchanka

 * 1) Graal Spike Thrower: As you first exit the crawlers, the weapon is leaning against a railing next to a Krogan Scout.
 * 2) Pistol Magazine Upgrade: To the right of the Graal, next to the first crawler.
 * 3) Death Mask: After finding the Graal, behind you next to the Krogan working on the crawlers.
 * 4) Shotgun Smart Choke: After finding the Graal, behind you next to the Krogan working on the crawlers.
 * 5) Pistol Melee Stunner: After finding the Graal, behind you next to the Krogan working on the crawlers.
 * 6) SMG Scope: After Kalros smashes through the bridge guarded by two Ravagers, pass through the covered structure and head down the steps. This will put you in a triangular area which your party will recognize as some sort of memorial. Once you've defeated the enemies that attack you, look around the rubble on the left side (as you enter from the covered structure). The mod is on the ground by the rubble.
 * 7) Assault Rifle Extended Barrel: After picking up the scope above, there will be a flight of stairs. At the landing, turn to your left; this mod is on the floor.
 * 8) M-5 Phalanx: Immediately after debarking the convoy to activate the maw hammers, head up the flight of stairs. This weapon will be to your left on the landing.

Priority: The Citadel II

 * 1) Assault Rifle Piercing Mod: In the room after meeting Bailey, up the stairs, on the counter to the right next to a med-kit.
 * 2) M-76 Revenant: In a bathroom during the first part of the level, in the washroom immediately to the left of where you entered under a sink.
 * 3) Recon Hood: Leaving the washroom with the Revenant to go back into the main bathroom, it is on a table to the left when you exit.
 * 4) Sniper Rifle Extended Barrel: In the side room with the weapon bench and elevator lock box on a shelf.
 * 5) M-358 Talon: First door on the left (locked) after exiting the elevator. The door can be opened with the terminal in the second room on the right.
 * 6) Securitel Helmet: In the room to the right of the locked door on a shelf.
 * 7) Pistol High-Caliber Barrel: In the room to the right of the locked door on a shelf.
 * 8) Pistol Piercing Mod: In room across from the locked door and the two other items.
 * 9) M-25 Hornet: On a dead Cerberus soldier in the middle of the room leading to the four above items.
 * 10) Sniper Rifle Piercing Mod: In the large, open room which exits to the Executor's office (there is a sign above the exit which says 'Executor'), turn to your right at the exit. On the corner of the long desk, you can pick up this mod.

Priority: Geth Dreadnought

 * 1) Shotgun Smart Choke: Once you are inside the dreadnought, in a little section left of the fork at the first door.
 * 2) Arc Pistol: After using the docking controls, Tali puts this weapon right in front of you during a cutscene.
 * 3) Sniper Rifle Enhanced Scope: Through first door after picking up the Arc Pistol, next to GARDIAN Defense Data.
 * 4) Archon Visor: Room after corridor with proximity mines and Geth, next to Signal Console.
 * 5) Geth Pulse Rifle: On a crate to the right in room just beyond the room with the Archon Visor, just before the door to the Operations Center.
 * 6) SMG Scope: In Operations Center, next to Operations Center Console (very hard to miss).
 * 7) Assault Rifle Precision Scope: In the Drive Core, where you find a Geth VI, it is on your right after the cutscene near a monitor on the lower level.

Priority: Rannoch

 * 1) SMG High-Caliber Barrel: At the bottom of the hill at the start of the Geth Base mission, in the area the geth were coming out of.
 * 2) Kassa Fabrication Gauntlets: While climbing the geth base, along the back wall by a ladder.
 * 3) Assault Rifle Piercing Mod: After finding the gauntlets, turn to your right and jump across the gap. You can pick up the mod here.
 * 4) SMG Ultralight Materials: After you go through the door and they talk about a blast shield, down the ramp to the left.
 * 5) Assault Rifle Stability Damper: After the SMG Ultralight Materials, in a cul-de-sac to the right at the beginning of the next fight.
 * 6) Geth Plasma Shotgun: After the Assault Rifle Stability Damper, on top of crates at the end of corridor next to an ammo crate.

Priority: Thessia

 * 1) Umbra Visor: In the first courtyard behind Lieutenant Kurin, leaning against a barrier.
 * 2) Shotgun High Caliber Barrel: On balcony above broken shotgun (3000 credits), opposite M-98 Widow (ramp leading up to this mod is located in right corner before going up the ramp to the Asari sniper and M-98 Widow; you will need to look up and pick it up through the ceiling.)
 * 3) M-98 Widow: About half way through the mission, on the perch the Asari sniper stands on.
 * 4) Sniper Rifle Concentration Mod: Near the M-98 Widow.
 * 5) Assault Rifle Extended Barrel: After your first fight with the ravagers, at the top and tucked between the rubble to the right.
 * 6) SMG Heat Sink: On the ground outside the Athame Temple in front of the force field.

Priority: Horizon

 * 1) Pistol Scope: After you enter the first building, go downstairs, and fight a group of Cerberus Troopers, pick up this mod next to a Cerberus trooper corpse lying next to a desk on top of a short set of stairs.
 * 2) Rosenkov Materials shoulders: To the left of exit door in the second chamber after draining the pool; it is on top of a bulkhead.
 * 3) M-12 Locust: Located in the room where you encounter cannibals and marauders, after repairing a console, on a table in the raised right side of the lab.
 * 4) Shotgun Blade Attachment: Just past the M-12 Locust on another table.
 * 5) M-99 Saber: After the fight with the Brutes and Banshee, in one of the closed husk pods. Opening the pods requires overriding the controls at a terminal at the opposite side of the same hall.

Priority: Cerberus Headquarters

 * 1) M-37 Falcon: After launching the fighter into the wall, the weapon can be found between the debris.
 * 2) Serrice Council Greaves: Behind you after viewing the first set of three logs (Lazarus Project).
 * 3) Delumcore Overlay: After talking to Hackett and waiting for EDI to open a door a second time, proceed all the way to the end of the corridor and enter the door on the right, go into this room and past a med kit to find this pickup.

N7: Cerberus Lab

 * 1) Sniper Rifle Scope Mod: In the room that the ramp to the left leads to, you can find this mod tucked into the corner on your left after you have entered the room.
 * 2) Alien Medi-Gel Formula: Located in the middle of the area in an alcove, it can be retrieved from a console.

N7: Cerberus Attack
Completing the mission objective will end the mission instantaneously; make sure to collect all items before finishing.
 * 1) Old Power Grid Schematics: On the other desk apart from the cannon controls in the control room, you can pick up this item by clicking on a hologram.
 * 2) Armax Arsenal Gauntlets: Near the control room, there are two ramps downwards, one closer to the desk which holds the Old Grid Schematics listed above and which leads outside, and one closer to the actual cannon controls that leads to another room within the same building. Take the ramp to the other room inside the building, and against the wall at the opposite end from the ramp you can pick up this armor.

Grissom Academy: Emergency Evacuation

 * 1) Assault Rifle Stability Damper: After you begin to head towards Orion Hall, take the door to the right at the sign that reads 'Ascension Hall.' In this next room, climb over the barrier to your right and head up the stairs leading to a door. This mod will be near the top.
 * 2) SMG Heat Sink: After you encounter the biotic being confronted by two Cerberus troopers, jump over the barrier into the next room. This item is located directly across the room from the barrier.
 * 3) M-22 Eviscerator: After you watch the student being gunned down by Cerberus troops, head into the room from which he came (it is on the left from where you entered.) On a couch to your left from entering this room, this gun is lying on a couch.
 * 4) M-96 Mattock: After you watch the student being gunned down, open the door to the right from where you enter. There is a couch in front of you as you enter this new room; this gun will be lying on its right side from where you enter.
 * 5) Mnemonic Visor: After you grab the Mattock, head in a straight line away from where you entered this room until you reach the wall. To your left is a couch, and atop of it is this armor.
 * 6) Assault Rifle Precision Scope: This is lying atop one of the desks upstairs, where the students are, after fighting an Atlas for the first time.
 * 7) M-96 Mattock (or M-22 Eviscerator): This is contingent on whether you made a Paragon decision at the end of the Mass Effect 2 DLC, Project Overlord. If you made a Paragon decision, a room will be unlocked for you. This gun will be inside. Might be replaced by an M-22 Eviscerator on some playthroughs.
 * 8) Sniper Rifle Piercing Mod: This mod is also contingent on whether you made a Paragon decision at the end of the Mass Effect 2 DLC, Project Overlord. This is in the same unlocked room as the Mattock above.
 * 9) Biotic Amp Interfaces: After meeting Octavia, the tech student shielding herself and other students from the Cerberus troopers, continue towards the next objective. In the next room, you will find a console on the right near the door. You can download the Biotic Amp Interfaces here.
 * 10) Serrice Council Chestplate: After the room in which you download the Biotic Amp Interfaces, open the door. In the wrecked room you find, head to the left from where you entered. This armor is lying on the couch on the left wall.
 * 11) SMG Magazine Upgrade: This item is located in the room after encountering the unmanned Atlas. Right to the left of the entrance to this room, this mod is lying on a couch.

Arrae: Ex-Cerberus Scientists

 * 1) Assault Rifle Magazine Upgrade: To the right of the work bench found after meeting with the scientists the first time.
 * 2) Shotgun High-Caliber Barrel: After a cutscene at the top of the stairs, go ahead and to the right up to a door. This mod is behind a crate.
 * 3) Cerberus Turian Poison: From the same stairs, to the left in a corner on top of a box. It looks like a microscope.
 * 4) Kassa Fabrication Greaves: On the right as you enter the med bay.
 * 5) M-6 Carnifex: After climbing the ladder in the gas-lit maintenance area after leaving the scientists, this will be on top of a pipe to your left.
 * 6) SMG High-Caliber Barrel: Behind a crate on the left after the first encounter with Cerberus back outside, directly before the Telemetry Override.
 * 7) Sniper Rifle Piercing Mod: Before climbing either tower against the back wall between the towers.
 * 8) Shotgun Spare Ammo: Climb up the first ladder to the AA gun that is to your right as you approach. On the landing between the first and second ladders up, you can pick up this mod. Repairing the last AA gun will kick you back to the scientists, make sure to collect everything beforehand.

Attican Traverse: Krogan Team

 * 1) M-300 Claymore: In the container right at the start of the mission.
 * 2) Pistol High-Caliber Barrel: In the container to the left of the Claymore.
 * 3) SMG High-Caliber Barrel: To the right of the weapon bench.
 * 4) Shotgun Shredder Mod: After encountering the first Ravager, to the left next to a dead krogan.
 * 5) Krogan Dying Message: After the roof collapses, hug the left wall. This item can be found behind one of the sections of webbing that can be burnt through. When you pick up this item, it will not register on your screen immediately; however, it will still be included in your journal.
 * 6) Shotgun Spare Ammo: After the roof collapses and you emerge from the narrow cavern into the more brightly-lit, wider area, you will encounter two groups of enemies. After finishing off the second, head to the left wall. This item will be against the wall.
 * 7) Ariake Technologies Shoulders: After picking up the Shotgun Spare Ammo, you will drop down and need to follow a winding path. Eventually, you will need to jump over a gap in order to continue. Up the path in front of you, you will see what looks like two blue lights. This is a dead krogan; this armor is lying next to him.
 * 8) Pistol Piercing Mod: Next to the second Reaper node on a dead krogan.

Kallini: Ardat-Yakshi Monastery

 * 1) Assault Rifle Stability Damper: Left side of shuttle drop-off location.
 * 2) Gallae's Electronic Signature: To the left in a small office in the very first pitch black room after descending into the monastery.
 * 3) Pistol Melee Stunner: Same small office as Gallae's Electronic Signature intel.
 * 4) Sniper Rifle Spare Thermal Clip: In another small office off the first pitch black room, on right side of entrance near the asari corpse.
 * 5) Asari Widow: After exiting the pitch black room, you'll meet Samara if she survived the suicide mission. Once the cutscene is over, head right and you'll find it next to a dead asari commando.
 * 6) Disciple: After entering a hallway after leaving the room where you first meet Falere, in an alcove to the right.
 * 7) Serrice Council Shoulder Guard: Near the Disciple.
 * 8) Assault Rifle Precision Scope: After bypassing door in the room with an asari corpse, can be found to by some containers on the left hand side of the room.

N7: Cerberus Abductions

 * 1) Dogtags: Head to the street to your right from where you start; you will come to a stop in front of building 22. Next to the second closest square column to the left of building 22, the dogtags are laying on the ground nearby.
 * 2) Capacitor Helmet: In the same courtyard, to the left of building 22, is building 97. In the corner where 97 and 22 abut, just above the painted numbers 97, is a yellow and black dumpster. This helmet is next to it on the ground.

N7: Cerberus Fighter Base

 * 1) Pistol Magazine Upgrade: From the fighter go straight into the main structure, on a bench to the right.
 * 2) Heating Unit Stabilizers: On the opposite wall from where the first objective is located (look high, you will need to click one of the monitors mounted on the wall). Once you defeat the last enemy, the mission will end automatically; make sure to gather all items or they will be lost.

N7: Communication Hub

 * 1) Ariake Technologies Greaves: Beneath main structure.
 * 2) Cerberus Ciphers: Facing the 2nd objective and going right, the terminal is along the first wall you hit near the ladder. Mission will end once you activate the third objective.

N7: Fuel Reactor

 * 1) Rosenkov Materials Chestplate: Found to the left of the starting point.
 * 2) Chemical Treatment: Head up to the left area at the start, on a datapad that overlooks the radiation below you.

Rannoch: Admiral Koris

 * 1) Javelin: After encountering the first group of geth, found along the path near a trip mine.
 * 2) Assault Rifle Magazine Upgrade: After disabling first AA gun, up the hill on a small ledge next to a medkit.
 * 3) Shotgun Shredder Mod: On a ledge to the left of a clearing with several disabled geth after a climb over the hill, just before meeting Dorn'Hazt.
 * 4) SMG Magazine Upgrade: On the ground just after talking to Dorn'Hazt, after climbing a ledge.
 * 5) Armax Arsenal Chest: On a crate near the right AA gun controls.
 * 6) Target Jamming Technology: Near the left AA gun, there is a terminal on the right wall against the Jamming Tower, labeled Jamming Tower Data; you can pick up Target Jamming Technology here. Mission will end automatically after disabling the last AA gun.

Rannoch: Geth Fighter Squadrons

 * 1) Reaper Code Fragments: Found on infection strand near the first infected data cluster you encounter (this strand cannot be destroyed; get close and an interaction point will appear).
 * 2) Improved Geth Resistors: You will receive this inside the Geth Consensus.
 * 3) Miniaturized Armor Capacitors: You will receive this inside the Geth Consensus.

Tuchanka: Turian Platoon

 * 1) SMG Magazine Upgrade: At the start in an alcove to the left before the ladder.
 * 2) M-9 Tempest: Located near the first escape pod next to the dead turians.
 * 3) Sniper Rifle Spare Thermal Clip: At the top of the ladder after the first Harvester.
 * 4) Phaeston: On a dead turian soldier.
 * 5) SMG Ultralight Materials: In the room past the Phaeston (straight ahead, not to the left).
 * 6) Hahne-Kedar Chest: After the second Harvester after the drop down a ledge on your left.
 * 7) Shotgun Smart Choke: After the next ledge, past the recording.
 * 8) Sniper Rifle Extended Barrel: After the third Harvester (may flee before you can kill it) down several ledges against the left wall.

Tuchanka: Bomb

 * 1) M-29 Incisor: After clearing the first field the weapon can be found on the left hand side of a ramp leading to the next area.
 * 2) Shotgun Blade Attachment: After the Incisor on the left hand side.
 * 3) Rosenkov Materials gauntlets: In an alcove on the right near a shield generator.
 * 4) SMG Heat Sink: After the next ramp/ledge on the right hand side.
 * 5) Pistol Scope: On some crates before a large drop into an open area (should see a shield generator from the ledge).
 * 6) Sniper Rifle Concentration Mod: Top of the ladder on a crate after seeing the bomb for the first time.
 * 7) Pistol Melee Stunner: In the next room behind some rubble, before the drop off.
 * 8) Cerberus Automated Turret Schematics: From some crates near a lone turret before meeting with Lt. Victus.

Priority: Eden Prime

 * 1) First Terminal with Resistance Movement Data: In building directly behind Elevator Console.
 * 2) Second Terminal with Resistance Movement Data: After raising elevator and first fight, the terminal is located in Building 5 (to the left after leaving elevator) along the back wall.
 * 3) Third Terminal with Resistance Movement Data: Drop out of doorway to the right of the second terminal and proceed into Building 2 (which will have 9s on the walls inside); go all the way through the building until you see a row of monitors and terminals, the center terminal has the data.
 * 4) Particle Rifle: Gained after completing mission.

Citadel: Leviathan I

 * 1) Pistol Cranial Trauma System: With lab behind you, far left corner of balcony.
 * 2) SMG High-Velocity Barrel: Across from the X3M/Rapid Transit.
 * 3) Ultralight Pistol Materials: Next to a tree on the right side of balcony.
 * 4) SMG Recoil System: On shelf near the rachni information in the second room.

Mahavid: Leviathan

 * 1) SMG High-Velocity Barrel: In bypassable room, near datapad with Garneau's message.
 * 2) Ultralight Pistol Materials: In Crew Quarters, after getting personnel ID from datapad outside of Medical Bay.
 * 3) SMG Recoil System: After Transit Station, on the ground after jumping gap before combat starts (impossible to miss).
 * 4) Pistol Cranial Trauma System: After defeating Banshees, in farthest corner of area by door.

Citadel: Leviathan II

 * 1) Assault Rifle Omni-Blade: Equipment locker with filter for requisitioned supplies.

Namakli: Leviathan

 * 1) AT-12 Raider: Found on dead body near first Cannibal.
 * 2) SMG High-Velocity Barrel: In structure near AT-12 Raider.
 * 3) SMG Recoil System: In structure after activating the elevator.
 * 4) Assault Rifle Omni-Blade: First structure after facing off with a Harvester.

Despoina: Leviathan

 * 1) Pistol Cranial Trauma System: Straight down leftmost side from shuttle.
 * 2) M-55 Argus: Straight down center of area from shuttle.
 * 3) Assault Rifle Omni-Blade: Located next to M-55 Argus.
 * 4) Ultralight Pistol Materials: Left side of second section where you have to backup Cortez after he crashes again.

The Invasion of Omega

 * 1) Assault Rifle High-Velocity Barrel: To the left of the second door.
 * 2) Pistol Heavy Barrel: To the left after first seeing the force field.
 * 3) Shotgun High-Velocity Barrel: Shortly after leaving the first area of Rampart Mechs before going into the tunnels.
 * 4) N7 Valkyrie: Down the hall after meeting Nyreen.

Talon Territory

 * 1) Assault Rifle High-Velocity Barrel: After climbing the first ladder, turn around and destroy the canisters. Activate the lift at the nearby console and climb back down the ladder. Ride the lift to the top to find the mod.
 * 2) Hacker Terminal 1: The first terminal you need for Omega: Assist the Hacker is right next to the lift controls mentioned above.
 * 3) Hacker Terminal 2: The second terminal can be found in the same room as your first battle with Cerberus, next to the open windows on your right as you enter.
 * 4) Hacker Terminal 3: After deactivating the Cerberus lockdown in the first room off the hallway, the final terminal is in the second room behind a Turian mercenary you can revive for XP.
 * 5) Phaeston: In front of you after joining with Nyreen (only present if you do not already have the Phaeston at any level)
 * 6) Shotgun High-Velocity Barrel: To the right after joining with Nyreen.
 * 7) Sniper Rifle Thermal Scope: At the start of the right catwalk when approaching the Talons' base.
 * 8) Shotgun Omni-Blade: Near the thankful turian once inside the Talons' base.
 * 9) Kehri Converter: The objective of Omega: Assist the Mechanic is across the same room as the thankful Turian, behind some crates.

The Mines

 * 1) Assault Rifle High-Velocity Barrel: After crossing the catwalk and meeting the first Cerberus soldier, take the first right turn.
 * 2) Pistol Heavy Barrel: Right next to ladder before going under the conveyer belt.
 * 3) Sniper Rifle Thermal Scope: After traveling beneath the conveyor belt climb the ladder up. Proceed straight ahead to the "Triage Area". The mod is at the back of the bins of eezo.
 * 4) Shotgun Omni-Blade: After taking the elevator up, the mod is on a rack behind where the engineer is standing.
 * 5) Chakram Launcher: From the Shotgun Omni-Blade mod, head down the passage to the right.

The Assault on Afterlife

 * 1) Sniper Rifle Thermal Scope: At the beginning of this section, across from the weapons bench.
 * 2) Aria's Couch: For Omega: Assist Harrot - right after you extend and cross the dam, immediately turn around and drop down the ladder next to you. You'll find the couch in a small heap.
 * 3) Shotgun High-Velocity Barrel: After Aria stops the fan, proceed up the ladder. The mod is to the left of the next ladder.
 * 4) Pistol Heavy Barrel: After fighting the Atlas, bypass the door and climb the ladder. Proceed right, and the mod package will be in a corner pit.
 * 5) Shotgun Omni-Blade: Past the Mad Prophet, near a krogan shooting its weapon.

Citadel Wards: Ambush

 * 1) M-11 Suppressor: Received automatically at the start of the mission.
 * 2) Pistol Power Magnifier: After falling into the lower wards, after the second firefight, in a store called Ryuusei.
 * 3) Assault Rifle Ultralight Materials: After using Spectre status to bypass the door, the mod will be on display in a store called Cepheid Variables.
 * 4) Sniper Rifle Ultralight Materials: After meeting Shepard's love interest (if squadmate) or Liara (if unromanced or love interest is not a member of Shepard's squad), on the floor opposite the used skycars.

Citadel Archives: Escape

 * 1) Shotgun Ultralight Materials: In the first area, on a desk near a medical station.
 * 2) SMG Power Magnifier: After passing through the security scanners, on desk near a med kit.
 * 3) M-7 Lancer: On the tram into the vault.
 * 4) Sniper Rifle High-Velocity Barrel: Move past the holo archive about the Battle of the Citadel to the back of the next room. The mod is on a desk against the far wall.
 * 5) Assault Rifle Ultralight Materials: In the corridor connecting the holo archives about the genophage with that of the first Spectre. (Glyph may need to point this mod out.)
 * 6) Sniper Rifle Ultralight Materials: From the previous mod, proceed towards the door out of the area. The mod is to the left along the way.

Citadel Docks: Retake the Normandy

 * 1) Sniper Rifle Ultralight Materials: When the Normandy starts getting ready to take off, before going down the ladder, near a med station.
 * 2) Shotgun Ultralight Materials: After climbing down the ladder from the previous mod, straight ahead on some crates.
 * 3) Assault Rifle Thermal Scope: Aboard the Normandy, at the security checkpoint that leads to the War Room.

Archon Visor

 * Helmet - Acquired during Priority: Geth Dreadnought

Ariake Technologies

 * Gauntlets - Located near console before heading back outside for the first time in Priority: Mars
 * Chest - Store purchase from Kassa Fabrication after Priority: The Citadel II
 * Shoulders - Acquired during Attican Traverse: Krogan Team
 * Greaves - Acquire during N7: Communication Hub beneath main structure.

Armax Arsenal

 * Shoulders - In a tent next to General Corinthus' in Priority: Palaven, near a weapon bench and a pistol piercing mod
 * Greaves - In Priority: Sur'Kesh, you will eventually need to stand still to be identified by a scanner. After this, you will head into a large room with two floors. Walk straight ahead from where you entered on the ground floor, and this armor will be on the first table in front of you.
 * Gauntlets - In N7: Cerberus Attack, there are two ramps near the cannon controls. One ramp leads outside, and is nearer the Old Power Grid schematics. The other is a ramp that leads to another room in the same building, and is closer to the cannon controls. Head down the ramp that leads to another room, and on the opposite end from the ramp this piece of armor is lying in front of the wall.
 * Chest - Found during Rannoch: Admiral Koris in right half of Jamming tower area near AA gun on a crate.

Blood Dragon Armor

 * Set Sold at Kanala Exports after Priority: Palaven

Capacitor Helmet

 * Helmet - Acquired during N7: Cerberus Abductions

Cerberus Armor

 * Set Sold at Elkoss Combine Arsenal Supplies after Priority: Palaven

Collector Armor

 * Set Sold at Nos Astra Sporting Goods after Priority: Palaven

Death Mask

 * Helmet - Acquired during Priority: Tuchanka

Delumcore Overlay

 * Helmet - Acquired during Priority: Cerberus Headquarters

Hahne-Kedar

 * Greaves - In a tent from the opposite end of where you enter the first base in Priority: Palaven
 * Gauntlets - Sold at Kanala Exports after Priority: Palaven
 * Chest - Acquired during Tuchanka: Turian Platoon
 * Shoulders - Store Purchase (after Priority: Rannoch.)

Inferno Armor

 * Set - Available on the Citadel after Priority: Mars at Kassa Fabrications

Kassa Fabrications

 * Chest - Located near the ladder leading up after going back outside for the first time in Priority: Mars
 * Shoulders - Store purchase from Cipritine Armory
 * Gauntlets - Found during the Priority: Rannoch Mission.
 * Greaves - acquire during Arrae: Ex-Cerberus Scientists

Kestrel Helmet

 * Helmet - purchase from Batarian State Arms after Priority: The Citadel II

Kuwashii Visor

 * Helmet - purchase from Aegohr Munitions after Priority: Tuchanka

Mnemonic Visor

 * Helmet - In Grissom Academy: Emergency Evacuation, head to the right door after watching the student being gunned down, and head forward from the exit until you reach the wall. To your left should be a couch; this armor lies atop of it.

N7 Armor

 * Set - Acquired automatically after Prologue: Earth

Recon Hood

 * Helmet - Acquired during Priority: The Citadel II

Rosenkov Materials

 * Chest - Found to the right of the Extraction Point at the end of the N7: Fuel Reactor Mission.
 * Shoulders - found in the Priority: Horizon mission just after draining a pool.
 * Gauntlets - Acquired during Tuchanka: Bomb
 * Greaves - Purchased at Spectre Requisitions (after Priority: The Citadel II)

Securitel Helmet

 * Helmet - Acquired during Priority: The Citadel II

Sentry Interface

 * Helmet - In Priority: Sur'Kesh, after holding still for a scanner to identify you, you will enter a large, two-story room. On the ground floor, head to the opposite end of this room from where you initially entered, going to the right past a ladder and then to your left. On a bench to your right in this alcove you can find this piece of armor.

Serrice Council

 * Chest - During Grissom Academy: Emergency Evacuation. Open the door to the right of Octavia and the others taking refuge from two Cerberus troops under an experimental shield bubble emitter. Head through the hallway into the wrecked room. After jumping over the couch, head to the left wall from where you entered. This armor will be lying on the couch.
 * Shoulders - found during the Kallini: Ardat-Yakshi Monastery Mission near the Disciple.
 * Gauntlets - Store purchase (after Priority: Thessia.)
 * Greaves - found during Priority: Cerberus Headquarters.

Terminus Armor

 * Set - Sold at Batarian State Arms after Priority: Palaven

Umbra Visor

 * Helmet - Acquired during Priority: Thessia

Assault Rifles

 * M-8 Avenger - Acquired at the end of Prologue: Earth, near the comm station.
 * M-15 Vindicator - Acquired at the end of the tram station in Priority: Mars, in a closet to the back left.
 * M-37 Falcon - At the start of Priority: Cerberus Headquarters, after launching the fighter into the wall, the weapon can be found between the debris.
 * M-55 Argus - Bonus weapon for pre-ordering Mass Effect 3. If Mass Effect 3: Leviathan is installed, it can be found on Despoina: Leviathan in the area straight down the shuttle.
 * M-76 Revenant - In Priority: The Citadel II, in a bathroom during the first part of the level, located three rooms after meeting Bailey on the left.
 * M-96 Mattock - In Grissom Academy: Emergency Evacuation, after you watch the student being gunned down, go to the door to your right from where you enter. When you enter this new area, you should see a couch in front of you. This gun is lying on its right side. In addition, in the same mission, you can find this gun again in a room that is unlocked if you completed the Mass Effect 2 DLC Project Overlord and made a Paragon decision at the end.
 * M-99 Saber - In Priority: Horizon, in one of the closed husk pods. Opening the pods requires overriding the controls at a terminal in the same hall.
 * Chakram Launcher - Requires completing the Kingdoms of Amalur: Reckoning demo and linking the Origin account to the game.
 * Geth Pulse Rifle - On a crate before the Operations Center on Priority: Geth Dreadnought.
 * N7 Valkyrie - Part of a bonus item pack for pre-ordering from certain distributors.
 * Particle Rifle - Acquired at the conclusion of Priority: Eden Prime.
 * Phaeston - On a dead Turian soldier early in Tuchanka: Turian Platoon.

Pistols

 * M-3 Predator - Acquired automatically at the beginning of Prologue: Earth
 * M-5 Phalanx - In Priority: Tuchanka, in the first area right before the battle with the Reaper.
 * M-6 Carnifex - In Arrae: Ex-Cerberus Scientists, after you exit the building to repair the antenna.
 * M-77 Paladin - Acquired at Spectre Requisitions on the Citadel after Priority: Mars
 * M-358 Talon - Can be acquired during Priority: The Citadel II. The weapon is in a locked room right before reaching the Executor's office. The door can be opened via a terminal in one of the rooms in the same area.
 * Arc Pistol - Tali or Xen puts this weapon right in front of you during a cutscene at the start of Priority: Geth Dreadnought.
 * N7 Eagle - Part of the additional weapons package for purchasing the Mass Effect 3 Collector's Edition.
 * Scorpion - In Priority: Sur'Kesh, after reaching the second quarantine checkpoint you will need to access a power terminal. In the same red room as the power terminal, on the wall opposite of said terminal, you will find this pistol lying on the ground.

Shotguns

 * M-11 Wraith - Acquired at Spectre Requisitions on the Citadel after Priority: Mars
 * M-22 Eviscerator - In Grissom Academy: Emergency Evacuation, after you watch a student being gunned down, head into the room he came from (it is to the left from where you entered.) To your left as you enter this new room is a couch; the shotgun is lying atop of it
 * M-23 Katana - Around the corner after exiting the sterilization room Priority: Mars
 * M-27 Scimitar - In Priority: Palaven, at the other end of the first base from where you first enter, to the left near a gate, behind a barrier next to an Assault Rifle Piercing Mod
 * M-300 Claymore - In Attican Traverse: Krogan Team, in the container right at the start of the mission.
 * AT-12 Raider - Bonus weapon for pre-ordering Mass Effect 3 over Origin. If Mass Effect 3: Leviathan is installed, it can be found on Namakli: Leviathan on a dead body in front of the structure the first Cannibals encountered came from.
 * Disciple - In Kallini: Ardat-Yakshi Monastery, in the room after you first talk to Samara and her daughter.
 * Geth Plasma Shotgun - In Priority: Rannoch, in the room before opening the blast doors.
 * Graal Spike Thrower - In Priority: Tuchanka, as you first exit the tanks the weapon is leaning against a railing next to a Krogan Scout.
 * N7 Crusader - Part of the additional weapons package for purchasing the Mass Effect 3 Collector's Edition.

Sniper Rifles

 * M-13 Raptor - In Priority: Sur'Kesh, in the area of the second quarantine checkpoint, head straight onwards from the entrance until you hit the wall. To your right, this sniper rifle is lying atop of a bench near a corpse.
 * M-29 Incisor - In Tuchanka: Bomb, after clearing the first field the weapon can be found on the left hand side of a ramp leading to the next area.
 * M-90 Indra - Available via code from Alienware preorders or the Firefight Pack.
 * M-92 Mantis - Located near the dead soldier seen after getting off the shuttle on Priority: Mars.
 * M-97 Viper - In Priority: Palaven, in the middle of the first base on some crates, near a datapad.
 * M-98 Widow -: In Priority: Thessia, about half way through the mission, on the perch the asari sniper stands on.
 * Black Widow - Acquired at Spectre Requisitions on the Citadel after Priority: Mars.
 * Javelin - In Rannoch: Admiral Koris, after encountering the first group of geth, found along the path near a trip mine.
 * N7 Valiant - Distributed as a bonus item with the Mass Effect 3 Collector's Edition.

Submachine Guns

 * M-4 Shuriken - Located near console before going back outside the first time in Priority: Mars
 * M-9 Tempest - Located near the first escape pod next to the dead turians Tuchanka: Turian Platoon
 * M-12 Locust - Located in the next room after repairing the console on a table in the middle of the lab Priority: Horizon
 * M-25 Hornet - In Priority: The Citadel II, on a dead Cerberus soldier after exiting the elevator.
 * N7 Hurricane - Part of the additional weapons in the Mass Effect 3 Collector's Edition.

Weapon Modifications
The following is a list of all weapon modifications. For the sake of organization, numbers 1-3 are found on missions, while 4 and 5 are found in stores, though you may buy store mods before finding the ones on missions. However, a (2) marked next to the second store mod indicates that it will only appear in that store after the previous one is bought. The first store mod costs 4000 credits, and the second costs 6000, before discounts and markups.

Assault Rifle Extended Barrel

 * 1) Priority: Sur'Kesh - After the first cutscene with the female krogan, turn around and head up the stairs. Between the two doors, on a shelf along the wall, is this mod.
 * 2) Priority: Tuchanka
 * 3) Priority: Thessia
 * 4) Cipritine Armory
 * 5) Batarian State Arms (2)

Assault Rifle High-Velocity Barrel
Requires Mass Effect 3: Omega
 * 1) Omega, The Invasion of Omega
 * 2) Omega, Talon Territory
 * 3) Omega, The Mines
 * 4) Harrot's Emporium
 * 5) Harrot's Emporium (2)

Assault Rifle Magazine Upgrade

 * 1) Priority: Palaven - In the airfield after you leave General Corinthus' base a second time, this is located near the center of the area alongside some thermal clips
 * 2) Arrae: Ex-Cerberus Scientists
 * 3) Rannoch: Admiral Koris
 * 4) Kassa Fabrication
 * 5) Batarian State Arms (2)

Assault Rifle Omni-Blade
Requires Mass Effect 3: Leviathan
 * 1) Citadel: Leviathan II - In the Requisitions Locker, only available after Mahavid
 * 2) Namakli: Leviathan
 * 3) Despoina: Leviathan - Near the landing area
 * 4) Batarian State Arms
 * 5) Cipritine Armory (2)

Assault Rifle Piercing Mod

 * 1) Priority: Palaven - At the other end of the first base from where you first enter, to the left near a gate, behind a barrier next to an M-27 Scimitar.
 * 2) Priority: The Citadel II - After leaving Bailey, near a med-kit.
 * 3) Priority: Rannoch
 * 4) Batarian State Arms
 * 5) Kassa Fabrication (2)

Assault Rifle Precision Scope

 * 1) Grissom Academy: Emergency Evacuation - This is located upstairs on one of the consoles after the first fight with an Atlas.
 * 2) Kallini: Ardat-Yakshi Monastery
 * 3) Priority: Geth Dreadnought
 * 4) Cipritine Armory
 * 5) Spectre Requisitions (2)

Assault Rifle Stability Damper

 * 1) Grissom Academy: Emergency Evacuation - Take a right at the sign that reads 'Ascension Wing' and use the door. In the area you enter, climb over the barrier to your right and head up the stairs. This mod is located near the top in front of the closed door.
 * 2) Kallini: Ardat-Yakshi Monastery - At the beginning on the left, just outside the monastery entrance.
 * 3) Priority: Rannoch
 * 4) Kassa Fabrication
 * 5) Cipritine Armory (2)

Assault Rifle Thermal Scope
Requires Mass Effect 3: Citadel
 * 1) Citadel Docks: Retake the Normandy
 * 2) Citadel Arena: Unusual Scores - Reward for completing third and final requested battle.
 * 3) Beat the high score on the Shattered Eezo game at the Castle Arcade
 * 4) Cipritine Armory
 * 5) Spectre Requisitions (2)

Assault Rifle Ultralight Materials
Requires Mass Effect 3: Citadel
 * 1) Citadel Wards: Ambush
 * 2) Citadel Archives: Escape
 * 3) Grand Prize in the Claw Game at Castle Arcade
 * 4) Aegohr Munitions
 * 5) Spectre Requisitions (2)

Pistol Cranial Trauma System
Requires Mass Effect 3: Leviathan
 * 1) Citadel: Leviathan I - On the balcony outside of the lab
 * 2) Mahavid: Leviathan - On the catwalks leading to the mines
 * 3) Despoina: Leviathan - On the port side of the shipwreck, beginning half of the wreck
 * 4) Nos Astra Sporting Goods
 * 5) Kassa Fabrication (2)

Pistol Heavy Barrel
Requires Mass Effect 3: Omega
 * 1) Omega, The Invasion of Omega
 * 2) Omega, The Mines
 * 3) Omega, The Assault on Afterlife
 * 4) Harrot's Emporium
 * 5) Harrot's Emporium (2)

Pistol High-Caliber Barrel

 * 1) Priority: Sur'Kesh - After clearing the first outdoor checkpoint, walk to the overhang ahead and move to the left; when you encounter the next group of enemies, hug the left wall from where you entered. This mod will be waiting on a shelf against the left wall.
 * 2) Attican Traverse: The Rachni
 * 3) Priority: The Citadel II
 * 4) Elkoss Combine Arsenal Supplies
 * 5) Aegohr Munitions (2)

Pistol Magazine Upgrade

 * 1) Priority: Palaven - Between General Corinthus' tent and a tent with a workbench, Pistol Piercing Mod, Armax Arsenal Shoulder Armor, and a workbench, this mod will be atop of a crate next to a data pad.
 * 2) N7: Cerberus Fighter Base
 * 3) Priority: Tuchanka
 * 4) Kassa Fabrication
 * 5) Elkoss Combine Arsenal Supplies (2)

Pistol Melee Stunner

 * 1) Tuchanka: Bomb
 * 2) Priority: Tuchanka
 * 3) Kallini: Ardat-Yakshi Monastery
 * 4) Kassa Fabrication
 * 5) Nos Astra Sporting Goods (2) after Priority: Thessia

Pistol Piercing Mod

 * 1) Priority: Palaven - In a tent adjacent to General Corinthus in the vicinity of a weapon bench and Armax Arsenal shoulder armor
 * 2) Attican Traverse: The Rachni
 * 3) Priority: The Citadel II
 * 4) Kassa Fabrication
 * 5) Aegohr Munitions (2)

Pistol Power Magnifier
Requires Mass Effect 3: Citadel
 * 1) Citadel Wards: Ambush
 * 2) Grand Prize in the Claw Game at Castle Arcade
 * 3) Citadel Arena: Unusual Scores - Reward for completing second requested battle.
 * 4) Nos Astra Sporting Goods
 * 5) Spectre Requisitions (2)

Pistol Scope

 * 1) Priority: Sur'Kesh - After reaching the second outdoor quarantine checkpoint, head left from the initial exit hugging the left wall. This mod can be found atop of a desk perpendicular to the left wall.
 * 2) Tuchanka: Bomb
 * 3) Priority: Horizon
 * 4) Aegohr Munitions
 * 5) Nos Astra Sporting Goods (2) after Priority: Thessia

Pistol Ultralight Materials
Requires Mass Effect 3: Leviathan
 * 1) Citadel: Leviathan I - On the balcony outside of the lab
 * 2) Mahavid: Leviathan - In the Crew Quarters of the facility
 * 3) Despoina: Leviathan - On the port side of the second half of the shipwreck
 * 4) Elkoss Combine Arsenal Supplies

Shotgun Blade Attachment

 * 1) Priority: Sur'Kesh - After encountering the first group of enemies, head towards the wall to the right in an open alcove. This mod will be waiting on a shelf against the wall.
 * 2) Tuchanka: Bomb
 * 3) Priority: Horizon
 * 4) Batarian State Arms
 * 5) Kassa Fabrication (2)

Shotgun High-Caliber Barrel

 * 1) Priority: Mars - In the decontamination room.
 * 2) Arrae: Ex-Cerberus Scientists - In the main hub on the second floor.
 * 3) Priority: Thessia - Balcony above Broken Shotgun (3000 credits) opposite M-98 Widow pickup, to the right of attacking Reaper forces, use the debris to climb up. Easily missed.
 * 4) Batarian State Arms
 * 5) Spectre Requisitions (2)

Shotgun High-Velocity Barrel
Requires Mass Effect 3: Omega
 * 1) Omega, The Invasion of Omega
 * 2) Omega, Talon Territory
 * 3) Omega, The Assault on Afterlife
 * 4) Harrot's Emporium
 * 5) Harrot's Emporium (2)

Shotgun Omni-Blade
Requires Mass Effect 3: Omega
 * 1) Omega, Talon Territory
 * 2) Omega, The Mines
 * 3) Omega, The Assault on Afterlife
 * 4) Harrot's Emporium
 * 5) Harrot's Emporium (2)

Shotgun Shredder Mod

 * 1) Priority: Mars - At the back of the tram station, right before the Archives.
 * 2) Attican Traverse: The Rachni
 * 3) Rannoch: Admiral Koris
 * 4) Elkoss Combine Arsenal Supplies
 * 5) Batarian State Arms (2)

Shotgun Smart Choke

 * 1) Tuchanka: Turian Platoon
 * 2) Priority: Tuchanka
 * 3) Priority: Geth Dreadnought
 * 4) Batarian State Arms
 * 5) Elkoss Combine Arsenal Supplies (2)

Shotgun Spare Ammo

 * 1) Priority: Sur'Kesh - In the area where the fire covers the hallway, you must vault over to the left to get around. The mod is impossible to miss, across the gap.
 * 2) Attican Traverse: The Rachni
 * 3) Arrae: Ex-Cerberus Scientists
 * 4) Kassa Fabrication
 * 5) Elkoss Combine Arsenal Supplies (2)

Shotgun Ultralight Materials
Requires Mass Effect 3: Citadel
 * 1) Citadel Archives: Escape
 * 2) Citadel Docks: Retake the Normandy
 * 3) Beat the high score on the Relay Defense game at the Castle Arcade
 * 4) Aegohr Munitions
 * 5) Spectre Requisitions (2)

Sniper Rifle Concentration Mod

 * 1) Priority: Mars - To the left of the tram controls.
 * 2) Tuchanka: Bomb
 * 3) Priority: Thessia
 * 4) Kanala Exports
 * 5) Spectre Requisitions (2)

Sniper Rifle Enhanced Scope

 * 1) Priority: Palaven - In Victus' camp, head all the way to the left from the entrance. After hitting the other end, to your right there will be a tent. This mod will be lying in front of the tent next to a medkit. Get it before defeating all enemies, as the mission will end immediately after the last enemy falls.
 * 2) N7: Cerberus Lab - In the room that the ramp to the left leads to, you can find this mod tucked into the corner on your left after you have entered the room.
 * 3) Priority: Geth Dreadnought
 * 4) Kanala Exports
 * 5) Cipritine Armory (2)

Sniper Rifle Extended Barrel

 * 1) Priority: Mars - In the decontamination room
 * 2) Tuchanka: Turian Platoon
 * 3) Priority: The Citadel II
 * 4) Cipritine Armory
 * 5) Spectre Requisitions (2)

Sniper Rifle High-Velocity Barrel
Requires Mass Effect 3: Citadel
 * 1) Citadel Archives: Escape
 * 2) Grand Prize in the Claw Game at Castle Arcade
 * 3) Citadel Arena: Unusual Scores - Reward for completing first requested battle.
 * 4) Cipritine Armory
 * 5) Spectre Requisitions (2)

Sniper Rifle Piercing Mod

 * 1) Grissom Academy: Emergency Evacuation - Can only be acquired by importing a file in which David Archer was sent to Grissom Academy at the end of Project Overlord.
 * 2) Priority: The Citadel II
 * 3) Arrae: Ex-Cerberus Scientists
 * 4) Cipritine Armory
 * 5) Kanala Exports (2)

Sniper Rifle Spare Thermal Clip

 * 1) Priority: Palaven - After defeating the Brute, along the path to Victus' camp, you will find two soldiers. This mod is next to one of them.
 * 2) Tuchanka: Turian Platoon
 * 3) Kallini: Ardat-Yakshi Monastery
 * 4) Kassa Fabrication
 * 5) Cipritine Armory (2)

Sniper Rifle Thermal Scope
Requires Mass Effect 3: Omega
 * 1) Omega, Talon Territory
 * 2) Omega, The Mines
 * 3) Omega, The Assault on Afterlife
 * 4) Harrot's Emporium
 * 5) Harrot's Emporium (2)

Sniper Rifle Ultralight Materials
Requires Mass Effect 3: Citadel
 * 1) Citadel Wards: Ambush
 * 2) Citadel Archives: Escape
 * 3) Citadel Docks: Retake the Normandy
 * 4) Aegohr Munitions
 * 5) Spectre Requisitions (2)

SMG Heat Sink

 * 1) Grissom Academy: Emergency Evacuation - After you encounter the biotic being confronted by two Cerberus soldiers, jump over the barrier into the next room. This mod is located atop one of the desks.
 * 2) Tuchanka: Bomb
 * 3) Priority: Thessia
 * 4) Aegohr Munitions
 * 5) Nos Astra Sporting Goods (2) after Priority: Thessia

SMG High-Caliber Barrel

 * 1) Attican Traverse: The Rachni
 * 2) Priority: Rannoch
 * 3) Arrae: Ex-Cerberus Scientists
 * 4) Nos Astra Sporting Goods
 * 5) Kanala Exports (2)

SMG High-Velocity Barrel
Requires Mass Effect 3: Leviathan
 * 1) Citadel: Leviathan I - On the balcony outside the lab
 * 2) Mahavid: Leviathan - In the storage room with Garneau's data pad
 * 3) Namakli: Leviathan - In the prefab facility near the AT-12 Raider Shotgun
 * 4) Aegohr Munitions
 * 5) Kanala Exports (2)

SMG Magazine Upgrade

 * 1) Grissom Academy: Emergency Evacuation - In the room after the unmanned Atlas, look to the left of the entrance after entering this area. To your left is a couch, where this mod is sitting.
 * 2) Tuchanka: Turian Platoon
 * 3) Rannoch: Admiral Koris
 * 4) Kanala Exports
 * 5) Nos Astra Sporting Goods (2) after Priority: Thessia

SMG Power Magnifier
Requires Mass Effect 3: Citadel
 * 1) Citadel Archives: Escape
 * 2) Awarded for completing Citadel Arena: Geth Challenge
 * 3) Grand Prize in the Claw Game at Castle Arcade
 * 4) Nos Astra Sporting Goods
 * 5) Spectre Requisitions (2)

SMG Recoil System
Requires Mass Effect 3: Leviathan
 * 1) Citadel: Leviathan I - On a shelf in the room with the plesiosaur
 * 2) Mahavid: Leviathan - On the catwalks leading to the mines
 * 3) Namakli: Leviathan - In a prefab near the elevator
 * 4) Kanala Exports
 * 5) Nos Astra Sporting Goods (2)

SMG Scope

 * 1) Priority: Mars - In the dark room requiring flashlights, to the right of the stairs near the kitchen.
 * 2) Priority: Tuchanka
 * 3) Priority: Geth Dreadnought
 * 4) Aegohr Munitions
 * 5) Kanala Exports (2)

SMG Ultralight Materials

 * 1) Priority: Mars - At the beginning of the hallway after the flashlight room, the one that introduces Guardian enemies.
 * 2) Tuchanka: Turian Platoon
 * 3) Priority: Rannoch
 * 4) Nos Astra Sporting Goods
 * 5) Aegohr Munitions (2)

Medi-Gel Capacity
All Medi-Gel Capacity upgrades are available from the Sirta Supplies terminal at Huerta Memorial Hospital or through the Procurement terminal aboard the Normandy (for a 10% price markup) after certain Priority missions. There are six in total:
 * Medi-Gel Capacity - Purchasable after Priority: Mars
 * Medi-Gel Capacity I - Purchasable after Priority: Palaven
 * Medi-Gel Capacity II - Purchasable after Priority: Sur'Kesh
 * Medi-Gel Capacity III - Purchasable after Priority: Tuchanka
 * Medi-Gel Capacity IV - Purchasable after Priority: The Citadel II
 * Medi-Gel Capacity V - Granted if Dr. Chloe Michel is recruited and Citadel: Medical Supplies is completed

Intel

 * Armor Modkit - Gained after leaving the Citadel for the first time if Lair of the Shadow Broker was completed in Mass Effect 2.
 * Weapon Modkit - Planet Verush, Harsa System, Kite's Nest Cluster after Priority: Mars
 * Remains of a Reaper Destroyer - Planet Borr, Asgard System, Exodus Cluster after Priority: Mars
 * Advanced Biotic Implants - Planet Metaponto, Aquila System, Aquila given by passing by a Salarian in Huerta Hospital after Priority: Sur'Kesh
 * Gallae's Electronic Signature - Kallini: Ardat-Yakshi Monastery, to the left in a small office in the very first pitch black room after descending into the monastery.
 * Prejek Paddlefish - The Prejek Paddlefish intel can be obtained by importing a Mass Effect 2 save file where Shepard purchased the Prejek Paddle Fish, and Kelly Chambers and Shepard's fish survived. Upon meeting Kelly on the Citadel in Mass Effect 3, she will return Shepard's fish. If they survive until the game is completed and that save file is imported into New Game +, then the intel will be acquired after returning to the Normandy SR-2.
 * Improved Geth Resistors - You will receive this inside the Geth Consensus in Rannoch: Geth Fighter Squadrons.
 * Miniaturized Armor Capacitors - You will receive this inside the Geth Consensus in Rannoch: Geth Fighter Squadrons.
 * Intel from the Battle of Arcturus - Scan Arcturus Station, Arcturus system, Arcturus Stream.
 * Intact Reaper Weapon - Scan Trategos, Pelion system, Nimbus Cluster.
 * Volus Intelligence Archives - Scan Oma Ker, Nura system, Aethon Cluster.
 * Research Data From Pragia - Scan Pragia, Dakka system, Nubian Expanse.
 * Med Bay Surgery - Complete Citadel: Medical Supplies

Citadel Mission Items

 * Pillars of Strength - Planet Khar'Shan, Harsa System, Kite's Nest Cluster after Priority: Mars
 * Alien Medi-Gel Formula - N7: Cerberus Lab, Planet Sanctum, Decoris System, Sigurd's Cradle. Found in the middle of the area on a computer in a small alcove.
 * Banner of the 1st Regiment - Planet Digeris, Castellus System, Apien Crest after Priority: Mars
 * Prothean Obelisk - Located on Planet Talis Fia, Urla Rast, Shrike Abyssal
 * Biotic Amp Interfaces - In Grissom Academy: Emergency Evacuation, after you meet Octavia, the woman who is shielding herself and other students from some Cerberus Troopers, continue onwards past the next door to the objective. In the next area, before the door, there is a console from which you can download this item.
 * Old Grid Schematics - In N7: Cerberus Attack, go into the control room for the cannon (it is the most elevated position on the map.) On the other desk from where you can control the cannon, search the hologram to pick up this item.
 * Dying Krogan Message In Attican Traverse: Krogan Team, after passing through the first door blocked off by a shield generator, the roof will cave-in. Immediately after, hug the left wall and burn through the sections blocked off by webbing. This will be found behind one of the sections, near a dead Krogan.
 * Hesperia-Period Statue - the gas giant Polissa in the Vernio system of the Athena Nebula
 * Dogtags - During the N7: Cerberus Abductions mission, look for dogtags which are located in the courtyard opposite building number 27, next to the second closest square column to building number 22.
 * Cerberus Automated Turret Schematics - from some crates before meeting with Lt. Victus during Tuchanka: Bomb
 * Cerberus Ciphers - Codes can be obtained via a terminal on the mission N7: Communication Hub. After the 2nd objective, the terminal is on the far right.
 * Cerberus Turian Poison - found during the mission Arrae: Ex-Cerberus Scientists in a corner of the main room on top of a box. It looks like a microscope.
 * Chemical Treatment - found in the mission N7: Fuel Reactor. Head up to the left area at the start, on a datapad that overlooks the radiation below you.
 * Heating Unit Stabilizers - acquired during the mission N7: Cerberus Fighter Base, on the opposite wall, where the first objective is located, under the ceiling.
 * Kakliosaur Fossil - planet Intai'sei in the Phoenix system of the Argos Rho cluster
 * Reaper Code Fragments - from the Rannoch: Geth Fighter Squadrons mission. It is found near the first infected data cluster you encounter.
 * Target Jamming Technology - during Rannoch: Admiral Koris, look for the Jamming Tower Data at the terminal diagonally opposite the last AA gun control.
 * Code of the Ancients - Scan planet Dekuuna from the Phontes System in the Silean Nebula
 * Obelisk of Karza - Scan the moon Kopis from the Hoplos system in the Hades Nexus cluster
 * Prothean Sphere - Scan the tiny, lone planet of Gei Hinnom from the Sheol sector in the Hades Nexus cluster
 * Book of Plenix - Scan the volus homeworld of Irune in the Aru System of the Aethon Cluster
 * Prototype Components - found by scanning Metaponto in the Aquila system of the Ismar Frontier cluster
 * Library of Asha - found on the planet Carcosa in the Agaiou system of the Nimbus Cluster
 * Rings of Alune - Scan planet Nevos in the Teyolia system of the Silean Nebula Cluster
 * Prothean Data Drives - Scan Garvug in the Paz System, in the Valhallan Threshold Cluster