Cabot Guns National Standard 1911 in .45 ACP with 5-inch barrel. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 7 Year introduced: 2012, USA Weight: 40 oz Overall length: 8.5" Status: Active Intended use: Cabot Guns mills its 1911 frames from solid steel billet for extreme precision.