The rarest WWII M1911A1 contractor. Singer sewing machine company produced only 500 pistols as part of an educational order. Most valuable production 1911A1. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 1942, USA Weight: 38.5 oz Overall length: 8.5" Status: Discontinued Military use: Yes Intended use: Military Sidearm