WWII-production M1911A1 with arched mainspring housing, shorter trigger, and relief cuts in the frame. Built by Colt, Remington Rand, Ithaca, US&S, and Singer. Standard US military sidearm from 1911–1985. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 7 Year introduced: 1924, USA Weight: 39 oz Overall length: 8.25" Status: Discontinued Military use: Yes Intended use: Military, Collector, Service