The original M1911 pattern pistol, John Browning's masterpiece and the U.S. military sidearm for 74 years. The most influential pistol design in history. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 1911, USA Weight: 38.5 oz Overall length: 8.5" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Competition, Self-Defense