Disambiguous.png This article is about the sniper rifle. For the armor set, see Mantis Armor. For the gunship, see A-61 Mantis Gunship.

The M-92 Mantis is a sniper rifle in Mass Effect 2 and Mass Effect 3.

Mass Effect 2[edit | edit source]

Description[edit | edit source]

Powerful sniper rifle able to take out most targets in a single shot. Incredibly accurate at long range, but rate of fire is slow. Effective against armor, but weaker against shields and biotic barriers.

Manufactured by Devlon Industries, the Mantis is primarily used by police and planetary militia groups. The prevalence of kinetic barriers has made this weapon less popular with the military, but it is used more frequently in the Terminus system where these defenses are less common.

Acquisition[edit | edit source]

You get this weapon automatically when you start the Freedom's Progress mission as a Soldier or Infiltrator.

Squad Use[edit | edit source]

This weapon can be used by Garrus, Legion, Thane, and Zaeed. Squadmates deal 45% less damage with this weapon than if wielded by Shepard.

Player Notes[edit | edit source]

  • The Mantis is a powerful and precise single-shot sniper rifle, able to kill most lower-ranked enemies with a single headshot, often even at higher difficulties with the right damage modifiers. This power is offset by a low rate of fire and a low ammunition reserve.
  • Infiltrators and Soldiers have the easiest time lining up precise and highly damaging headshots using Adrenaline Rush, Tactical Cloak and the time dilation effect of the Infiltrator's class skill. Other classes that choose sniper rifle training on the Collector Ship don't have these tools to call on and may find it more effective to use either the semi-automatic M-97 Viper or burst-fire M-29 Incisor which have more forgiving ammo capacities and firing rates than the Mantis.
  • The Mantis is superior to the M-97 Viper for NPC squadmates since they do not take advantage of the Viper's rapid-fire ability but only use single aimed shots just as they do with the Mantis, which will result in much less damage. However the M-29 Incisor in turn may be superior to the Mantis for squadmates; see its page for more information.
  • At higher difficulty levels where most enemies have protection (shields, barriers, or armor) the Mantis loses effectiveness as a "one shot, one kill" weapon. However, once said protection is gone, a clean headshot still inflicts impressive and often fatal damage.
    • Using the right ammo power is essential for one-shotting enemies with protection. It's always best to use the ammo power that deals bonus damage to the first protection layer that will be damaged by a shot, even if that protection layer is only at minimal strength and most of the damage from a shot will also be applied to the layer underneath. Therefore against shielded targets, Disruptor Ammo should be used; against targets with a barrier Warp Ammo should be used; and against targets where armor is the first layer of protection Incendiary, Armor-Piercing, or Warp Ammo are the best choices. If for example Incendiary Ammo is active and a shot is fired at a target that still has shields, the Incendiary Ammo will have no effect whatsoever on the damage done by that single shot, even if most of the damage was applied to the health bar underneath the shield and the shield may have been only a tiny sliver.
    • The M-98 Widow, if available, is a direct upgrade to the Mantis in terms of one-shot kill potential especially at the higher difficulties.

Mass Effect 3[edit | edit source]

Description[edit | edit source]

The Mantis is a powerful sniper rifle able to take out most targets in a single shot. It's incredibly accurate at long range, but rate of fire is slow. Manufactured by Devlon Industries, the Mantis is primarily used by police and planetary militia groups.

Acquisition[edit | edit source]


The M-92 Mantis is automatically given to Infiltrators at the beginning of Priority: Mars. Otherwise, find it on a dead Alliance soldier after dropping off the first ledge. It is not purchasable from a shop if missed during the mission.


The M-92 Mantis is one of the five starter weapons. Upgrades are randomly rewarded through purchases of item packs. The Mantis is categorized as common.

Player Notes[edit | edit source]

  • A fully upgraded Mantis can make for an extremely powerful weapon and is more than capable of killing most enemies in one or two shots. While outclassed by the Widow's Armor piercing and damage, it makes up that deficit with a combination of accuracy and a lighter weight. This allows it to be paired with a light SMG or Geth Pulse Rifle, which is especially useful for biotic classes where the weight can affect power recharge. However, just as with other sniper rifles, it will do about half its normal damage if fired without aiming with the scope.
  • The M-92 Mantis is a single shot sniper rifle, requiring a reload after each shot. So be sure to make every precious shot count.
  • A "quick reload" or "reload-cancel" can be performed by either using a power, sprinting very briefly or entering/exiting cover, after a round has been loaded into the chamber (about halfway through the reload: visual indicator is a '1' on the ammo indicator, audible indicator is the first "Sshck" sound played). The reload sequence will appear to halt, but the rifle will be loaded and ready to fire.
  • As with most of the sniper rifles, it has pin-point accuracy, meaning where you aim is where your bullet will go.
  • As with all sniper rifles, it suffers from being heavy to carry, and will hinder any player who prefers to use powers frequently.
  • Until you can level up the Mantis which provides additional spare clip capacity, or acquire the Sniper Rifle Spare Thermal Clip mod, ammo is very scarce.

  • In multiplayer, equipping a high level Mantis with the Sniper Rifle Piercing Mod along with the Infiltrator's pairing of Tactical Cloak and class specific passive powers (with damage focus), it can yield a massive punch to difficult enemies.
  • A Sniper Rifle Piercing Mod can turn the Mantis into a weaker, but much lighter version of the M-98 Widow and Black Widow rifles as well as the Javelin rifle. While it can take time to get the Sniper Rifle Piercing Mod fully upgraded to Level V, it can, with the right upgrades or mods, make this rifle a sufficient replacement for the two Widows and Javelin rifle.
  • The M-92 Mantis is a very powerful weapon from the get-go. Its weight can be reduced to make it a fairly useful rifle even for power-intensive classes. With the ability to one shot kill basic troopers with a headshot, or cripple shielding of tougher enemies, the Mantis is more than capable of dealing with enemies on the hardest difficulties without sacrificing too much recharge speed. This becomes even more apparent in the hands of a Batarian Enforcer Sentinel, where its Submission Net can hold enemies in place, upgrades to weight capacity with the passive class power Batarian Enforcer can greatly improve power recharge speed, and then the damage the Mantis inflicts can be fatal to most enemies.
  • The Mantis X, with an Sniper Rifle Extended Barrel V, in the hands of a character invested in passive class powers that increase weapon damage is capable of one-shot headshots on all unprotected infantry-level enemies.
    • Used in tandem with Overload, one can use the power to destroy the shielding on a Centurion, Nemesis, or Marauder then proceed to headshot and kill them instantly, even on Gold difficulty.

Trivia[edit | edit source]

  • While the Mantis looks nearly identical to the standard sniper rifle from Mass Effect, the scope has changed and the multiple levels of magnification are absent.
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