Series 80 production M1991A1 with parkerized finish and 5-inch barrel. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 1991, USA Weight: 38 oz Overall length: 8.5" Status: Active Intended use: M1991A1 was Colt's budget-accessible 1911 for the commercial market.