The M1919 SubmachinegunEdit
This weapon was intended to be a light machine gun that could easily be operated by a single soldier, dramatically increasing his combat effectiveness by swiftly firing up to 50-100 rounds from stick and drum magazines. The "Annihilator" was one of the first submachine gun designs that was able to integrate a friction-delayed blowback mechanism, enabling a high rate of automatic fire with .45 ACP pistol ammunition. Tests were promising but the war was over before the prototype could be shipped. A later model was eventually issued to the US Marine Corps that would gain notoriety as the favored murder weapon of American gangsters during the prohibition era.