The Singer Manufacturing Company produced only 500 M1911A1 pistols in 1941 as part of an educational order to teach small manufacturers how to produce handguns. These pistols are among the rarest and most valuable WWII-era collectibles. Type: Semi-Auto Pistol Action: Single-Action Caliber: 45 ACP Capacity: 7 Year introduced: 1941, USA Weight: 39 oz Overall length: 8.5" Status: Discontinued Military use: Yes Intended use: Military, Collector