WWII M1911A1 produced by Union Switch & Signal, a railroad signaling equipment manufacturer. Approximately 55,000 units with distinctive high-polish finish. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 1943, USA Weight: 39 oz Overall length: 8.5" Status: Discontinued Military use: Yes Intended use: Service