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.
 * 2) Ariake Technologies Gauntlets: Picked up near console that opens the first door back outside.
 * 3) M-4 Shuriken: Picked up past console that opens the first door back outside, is located near a med-kit.
 * 4) Kassa Fabrications Chestplate: Picked up outside next to a ladder back up.
 * 5) SMG Scope Upgrade: Located to the right of the stairs you descend in the dark room you enter from the outside, near the kitchen.
 * 6) SMG Ultralight Materials: Located near a body in the area after watching the security footage.
 * 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.
 * 10) Sniper Rifle Concentration Mod: Located in a closet near the console at the tram station.
 * 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 Ammo: 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. IMPORTANT: 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 may lose the chance 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 Ammo: 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 tanks 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 the turian fighter crashes into the convoy it can be found among the dead krogan
 * 4) Shotgun Smart Choke: after the turian fighter crashes into the convoy it can be found among the dead krogan
 * 5) Pistol Melee Stunner:after the turian fighter crashes into the convoy it can be found among the dead krogan
 * 6) SMG Scope: behind cover before a set of stairs with a mural of Kalros above
 * 7) Assault Rifle Extended Barrel: immediately after the up and down stairs on the left before rejoining the crawlers on the dunes
 * 8) M-5 Phalanx: in the first area right before the battle with the Reaper.

Priority: The Citadel II

 * 1) Assault Rifle Piercing Mod: After leaving Bailey, near a med-kit.
 * 2) M-76 Revenant: in a bathroom during the first part of the level, located three rooms after meeting Bailey on the left
 * 3) Recon Hood: outside the bathroom with the Revenant to the right on a desk
 * 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) Security 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 far right corner of the office are below the executor's office

Priority: Geth Dreadnought

 * 1) Archon Visor:
 * 2) Geth Pulse Rifle: On a crate before the Operations Center
 * 3) Arc Pistol: Tali puts this weapon right in front of you during a cutscene
 * 4) Assault Rifle Precision Scope:
 * 5) Shotgun Smart Choke:
 * 6) Sniper Rifle Enhanced Scope:
 * 7) SMG Scope:

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 Fabrications gauntlets: while climbing the geth base, along the back wall by a ladder
 * 3) Assault Rifle Piercing Mod: Along the back wall need to jump over the gap to get to it
 * 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: in the room before opening the blast doors

Priority: Thessia

 * 1) Umbra Visor: In the first courtyard where you meet Lieutenant Kurin
 * 2) M-98 Widow: About half way through the mission, on the perch the Asari sniper stands on
 * 3) Sniper Rifle Concentration Mod: Near the M-98 Widow
 * 4) Assault Rifle Extended Barrel: After your first fight with the ravagers, at the top and to the right of the rubble
 * 5) SMG Heat Sink: On the ground outside the Athame Temple

Priority: Horizon

 * 1) Rosenkov Materials shoulders: just after draining a pool
 * 2) M-99 Saber: in one of the closed husk pods. Opening the pods requires overriding the controls at a terminal in the same hall.
 * 3) M-12 Locust: Located in the next room after repairing the console on a table in the middle of the lab
 * 4) Pistol Scope:
 * 5) Shotgun Blade Attachment:

Priority: Cerberus Headquarters

 * 1) Delumcore Overlay:
 * 2) Serrice Council greaves:
 * 3) M-37 Falcon: after launching the fighter into the wall, the weapon can be found between the debris

Priority: Eden Prime

 * 1) Particle Rifle: Gained after completing mission

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
NOTE: 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 on one of the four desks.
 * 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: This is contingent on whether you made a Paragon Decision in 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.
 * 8) Sniper Rifle Piercing Mod: This mod is also contingent on whether you made a Paragon Decision in 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 biotic woman 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
 * 2) Shotgun High-Caliber Barrel: top of the stairs ahead and to the right behind a crate
 * 3) Kassa Fabrications greaves:
 * 4) M-6 Carnifex: after you exit the building to repair the antenna


 * 1) Shotgun Spare Ammo:
 * 2) Sniper Rifle Piercing Mod:
 * 3) SMG High-Caliber Barrel:
 * 4) Cerberus Turian Poison: in a corner of the main room on top of a box. It looks like a microscope.

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) Shotgun Spare Ammo: after the roof collapses, in the large cavern along the left wall
 * 6) Ariake Technologies shoulders: at the end of the large cavern on the stairs next to a krogan
 * 7) Pistol Piercing Mod: next to the second reaper node on a dead krogan

Kallini: Ardat-Yakshi Monastery

 * 1) Serrice Council shoulders: near the Disciple
 * 2) Disciple: in the room after you first talk to Samara and her daughter
 * 3) Assault Rifle Precision Scope:
 * 4) Assault Rifle Stability Damper:
 * 5) Pistol Melee Stunner:
 * 6) Sniper Rifle Spare Thermal Clip:
 * 7) Gallae's Electronic Signature: to the left in a small office in the very first pitch black room after descending into the monastery

N7: Cerberus Abductions

 * 1) Dogtags: in the courtyard opposite building number 27, next to the second closest square column to building number 22
 * 2) Capacitor Helmet: in the same courtyard, exit building number 27 and hug the wall til you hit the second corner, next to the dumpster

N7: Cerberus Fighter Base

 * 1) Pistol Magazine Upgrade: from the fighter go straight into the main structure, on a console to the right
 * 2) Heating Unit Stabilizers: on the opposite wall, where the first objective is located, under the ceiling

N7: Communication Hub

 * 1) Ariake Technologies greaves: beneath main structure
 * 2) Cerberus Ciphers: After the 2nd objective, the terminal is on the far right

N7: Fuel Reactor

 * 1) Rosenkov Materials chest: Found to the right of the Extraction Point at the end
 * 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) Armax Arsenal chest: in right half of Jamming tower area near AA gun on a crate
 * 2) Javelin: After encountering the first group of geth, found along the path near a trip mine
 * 3) Assault Rifle Magazine Upgrade:
 * 4) Shotgun Shredder Mod:
 * 5) SMG Magazine Upgrade:
 * 6) Target Jamming Technology: look for the Jamming Tower Data at the terminal diagonally opposite the last AA gun control

Rannoch: Geth Fighter Squadrons

 * 1) Improved Geth Resistors: You will receive this inside the Geth Consensus
 * 2) Miniaturized Armor Capacitors: You will receive this inside the Geth Consensus
 * 3) Reaper Code Fragments: found near the first infected data cluster you encounter

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

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 before meeting with Lt. Victus

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

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: Sur'Kesh
 * 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

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 Acquisitions (after Priority: The Citadel II)

Security 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, the biotic woman shielding herself and other students from the Cerberus Troopers. 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.
 * 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 preordering 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 puts this weapon right in front of you during a cutscene at the start of Priority: Geth Dreadnought.
 * N7 Eagle - Part of the addional weapon 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.
 * 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 Rifle

 * 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 - Only available via code from Alienware preorders.
 * 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 125 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.

NOTE: The final Shotgun High Caliber Barrel mod has not yet been located. It was erroneously marked as found on Priority: Thessia, but this has not been confirmed. It is the only modification that requires independent location at this point.

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 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 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)

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 Sportings 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 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

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
 * 3) Batarian State Arms
 * 4) Spectre Requisitions (2)
 * 1) Spectre Requisitions (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 Suppplies
 * 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)

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 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)

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 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 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 Foundation terminal at Huerta Memorial Hospital at varying points in the game. There are five in total:


 * Medi-Gel Capacity I- Can be bought on the Citadel after Priority: Mars at Huerta Hospital
 * Medi-Gel Capacity II- Can be bought on the Citadel after Priority: Sur'Kesh at Huerta Hospital

Intel

 * Armor Modkit - Gained after leaving the Citadel for the first time
 * 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.
 * 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