Mass Effect Character Weapon Mods

Weapon Mods are applied to assault rifles, shotguns, sniper rifles, submachine guns, and pistols to augment them. Available mods include high-caliber barrels, scopes, and bayonet attachments, among others. Only two mods can be applied to a weapon at a time, and the same mod cannot be applied twice to a single weapon.
Once a weapon mod is found, it may be applied to any and all of the weapons of the applicable type at a weapon bench.

Level	I	II	III	IV	V
Installation Difficulty	Very Easy	Easy	Moderate	Difficulty	Very Difficult

Assault Rifle Mods
Shotgun Mods
Sniper Rifle Mods
Submachine Gun Mods
Pistol Mods
Heavy Weapon Mods