Simplified M3 variant eliminating 13 parts including the cocking handle — a finger hole in the bolt allowed manual cocking. Ejection port cover served as the only safety. Type: Submachine Gun Action: Blowback Caliber: .45 ACP Capacity: 30 Year introduced: 1944, USA Weight: 64 oz Overall length: 29" Status: Discontinued Military use: Yes Intended use: military