The Auto-Ordnance 1911BKO is a usa-made single-action pistol chambered in .45 ACP, introduced in 2010. Primary use: Home Defense, Range, Collecting. Type: Pistol Action: Single-Action Caliber: .45 ACP Capacity: 7 Year introduced: 2010, USA Weight: 30 oz Overall length: 8.5" Status: Active Intended use: Home Defense, Range, Collecting