The rarest production M1911A1. Only 500 units manufactured by Singer, the sewing machine company. Issued to Army Air Corps officers. Verified examples sell for $50,000+. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 1942, USA Weight: 39 oz Overall length: 8.5" Status: Discontinued Military use: Yes Intended use: Service