The .45 Auto submachine gun (SMG) is an old two-handed automatic weapon that was stored in the U.S. Army and National Guard armories at the time of the war. A large number of them have surfaced after these armories were breached by looters after the war, most notably the White Legs, for whom the .45 SMG has become a signature weapon.
Like most automatic weapons, the high spread of this weapon requires the shooter to be at close range for all of the rounds fired to impact on the target, though this can be negated somewhat by the recoil compensator. Additionally, the gun consumes ammunition quickly, and can eat through .45 Auto rounds at alarming speeds.