The STI International 2011 Tactical is a usa-made semi-automatic pistol chambered in .45 ACP, introduced in 2003. Primary use: Tactical, Carry. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 17 Year introduced: 2003, USA Weight: 42 oz Overall length: 8.65" Status: Active Intended use: Tactical, Carry