A crude but reliable stamped-steel submachine gun developed to replace the expensive Thompson. Nicknamed the Grease Gun for its resemblance to the automotive tool. Remained in US military service until the Gulf War. Type: Submachine Gun Action: Automatic Caliber: .45 ACP Capacity: 30 Year introduced: 1943, USA Weight: 211.2 oz Overall length: 29.8" Status: Discontinued Military use: Yes Intended use: Close Quarters, Armor, Military