ME3 weapons

Assault rifles :

M-8 Avenger
M-76 Revenant
M-96 Mattock
Geth Pulse Rifle
Collector Assault Rifle
M-15 Vindicator

Cobra - new
M-37 Falcon - new
M-99 Saber - new
Phaeston - new
N7 Valkyrie (DLC) - new
Chakram Launcher (DLC) - new
M55 Argus (DLC) - new

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Pistols:

M-3 Predator
M-5 Phalanx
M-6 Carnifex

Ivory - new
Scorpion Defensive Ordnance Pistol - new
M-358 Talon - new
Thor - new
Arc Pistol - new
N7 Eagle (DLC) - new

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Shotguns:

M-23 Katana
M-22 Eviscerator
M-27 Scimitar
M-300 Claymore
Geth Plasma Shotgun

The Disciple - new
Graal Spike Thrower - new
Striker - new
Centurion - new
N7 Crusader (DLC) - new
AT12 Raider (DLC) - new

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Submachine guns:

M-4 Shuriken
M-9 Tempest
M-12 Locust

M-237S Hornet - new
N7 Hurricane (DLC) - new

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Sniper rifles :

M-92 Mantis
M-97 Viper
M-98 Widow
M-29 Incisor

M-112 Raptor - new
M-90 Indra - new
Javelin - new
Black Widow - new
N7 Valiant (DLC) - new

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Heavy weapons :

M-622 Avalanche
M-920 Cain
M-451 Firestorm
M-100 Grenade Launcher
ML-77 Missile Launcher
M-490 Blackstorm
Arc Projector
Collector Particle Beam

Geth Spitfire - new
M-51 Havoc - new
Black Star - new
Hydra - new