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Thompson submachine gun is an American submachine gun, which is used in several different models since the 1920s. General John Taliaferro Thompson, designed by the balance of the main models are the M1921, M1928, M1928A1, M1 and M1A1. Caliber is .45 ACP (Automatic Colt Pistol).
M1 and M1A1 are the Second World War, the manufacture of the simplified models.