Mass Effect 3: How to Find Every Weapon

War is expensive, you’re going to want to save all those credits for a rainy day because every conventional weapon can be found somewhere in the huge campaign of Mass Effect 3. Keep those eyes open and searching, or give your mind a rest and use our location guide to get an idea of where each of these gifts from heaven can be found and unlocked for your whole team. Each weapon is unique, with many returning favorites of ME2 mixed in with all new special weapons with very special effects of their own. Finally the guns are something you’ll want to discover. Get cracking.
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SPOILER WARNING: Mass Effect 3 Spoilers Ahead!
Weapon Locations
Pistols

• M3 Predator: First weapon acquired during the Prologue.
• Scorpion: Acquired in the mission Priority: Sur’Kesh, find the weapon on the floor where Mordin requires you to reactivate the elevator power source. After reactivating the power, find the weapon before turning on the elevator.
• M-5 Phalanx: Acquired in the mission Priority: Tuchanka, find it on the ground, up the steps leading to the long stretch where the Reaper begins firing it’s laser at your team.
• M-358 Talon: Acquired in the mission Priority: The Citadel, while in C-Sec HQ, you’ll enter a dark hallway with four offices. One of the first offices is locked. Continue ahead down the only path forward, and you’ll find a computer console that will open the office door. Run back, open the door, and claim your pistol among some other weapons.
• M-6 Carnifex: Acquired during the Arrae: Ex-Cerberus Scientists side-mission. Find this pistol on a pipe in the red-bathed maintenance hallway before taking the ladder up.
• Arc Pistol: Acquired during the Priority: Geth Dreadnought mission, where it’s given to Shepard by Tali.
• M-77 Paladin: This weapon can be purchased from Spectre Requisitions, a store console in the Spectre Office in the Citadel, for 200,000 credits.

Shotguns

• M-23 Katana: Given during the Priority: Mars mission as a starting weapon.
• M-27 Scimitar: Acquired during the Priority: Palaven mission, find this one in the main Turian camp on the ground as you exit for your first objective.
• M-22 Eviscerator: Acquired during the Grissom Academy: Investigation mission, find this shotgun on a red couch after saving the first student.
• M-300 Claymore: Acquired during the Attican Traverse: Krogan Team mission, found in the abandoned camp in the left building just as you enter.
• Graal Spike Thrower: Acquired during the Priority: Tuchanka mission, found near a guard waiting by the railing just as the mission begins.
• Disciple: Acquired during the Lesuss: Ardat-Yakshi Monastery mission, found after discovering the lone Asari, and entering a combat room filled with Cannibals and a shield generator.
• Geth Plasma Shotgun: Acquired during the Priority: Rannoch mission, entering a large combat area with the Geth stuck on a balcony, fight off the enemies and search right of the area’s entrance to find this shotgun.
• M-11 Wraith: Can be purchased from Spectre Requisitions, from your Spectre Office in the Citadels, for 250,000 credits.

Submachine Guns

• M-4 Shuriken: Acquired during the Priority: Mars mission, found inside a lobby security room where Liara works at a computer. Pick up the SMG before activating the security console.
• M-9 Tempest: Acquired during the Tuchanka: Turian Platoon mission, found on the ground after defeating a set of unaware Husks and climbing a ladder up, deeper into the caves.
• M-25 Hornet: Acquired during the Priority: Citadel mission, found entering a new area after taking an elevator up, look on the right side for a few items, including this SMG.
• M-12 Locust: Acquired during the Priority: Horizon mission, found on the right-side of the early lab.

Assault Rifles

• M-8 Avenger: Acquired during the Prologue.
• M-15 Vindicator: Acquired during the Priority: Mars mission, just before entering the Archive chamber, you’ll be able to spot a small security room just off the main hallway. Find the AR inside.
• M-96 Mattock: Acquired during the Grissom Academy: Investigation mission, found after leaving the classroom, search the hallway with the red benches.
• Phaeston: Acquired during the Tuchanka: Turian Platoon mission, found after chasing off a Harvester and running into some dead Turians in your path. Look near the bodies for this powerful Assault Rifle.
• M-76 Revenant: Acquired during the Priority: Citadel mission, found before running into a Combat Engineer working on a latch. When you spot him, kill him, but don’t work on the latch yourself. Turn around and enter the restroon of the previous area to find this AR.
• Geth Pulse Rifle: Acquired during the Priority: Perseus Veil mission, found nearing the control room. Find it on a shelf almost directly in your main path, just off to the right.
• M-99 Saber: Acquired during the Priority: Horizon mission.
• M-37 Falcon: Acquired during the Priority: Cerberus HQ mission.

Sniper Rifles

• M-92 Mantis: Acquired during the Priority: Mars mission, just after taking the ladder down, look to your right to find this rifle on the ground.
• M-97 Viper: Acquired during the Priority: Palaven mission, found on some boxes right in the center of the main Turian camp.
• M-13 Raptor: Acquired during the Priority: Sur’Kesh mission, found on a bench overlooking the outer facility on the floor where Mordin requires you to reset the elevator power source.
• M-29 Incisor: Acquired during the Tuchanka: Bomb sidemission, found on a ramp just as you exit the first combat zone.
• Javelin: Acquired during the Rannoch: Admiral Koris mission.
• M-98 Widow: Acquired during the Priority: Thessia mission.
• Black Widow: Can be purchased from the Spectre Requisitions terminal in the Spectre Office at the Citadel for 250,000 credits.