The original Commander introduced the shortened 4.25-inch barrel and slide to the 1911 platform for the US military's attempt to find a lighter service pistol. The aluminum-frame Lightweight Commander was the first widely produced alloy-frame 1911. Type: Semi-Auto Pistol Action: Single-Action Caliber: .45 ACP Capacity: 7 Year introduced: 1950, USA Weight: 26.5 oz Overall length: 7.75" Status: Active Intended use: Duty, Carry, Service