STI Competitor in 45 ACP. Single-stack 1911-format competition pistol for USPSA Single Stack and IPSC Classic division. The 45 ACP variant is the most common Competitor caliber, reflecting the dominance of 45 ACP in single-stack competition. Features match barrel, adjustable rear sight, and extended front strap checkering. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 8 Year introduced: 2008, USA Weight: 36 oz Overall length: 8.5" Status: Discontinued Intended use: USPSA Single Stack, IPSC Classic, Competition