The original STI 2011 race gun that defined the modern Open division. Wide-body polymer grip module with steel frame inserts; compensator-ready; dominated USPSA Open for decades. Type: Pistol Action: Single-Action Caliber: 9mm Luger Capacity: 18 Year introduced: 1994, USA Weight: 44 oz Overall length: 8.7" Status: Discontinued Intended use: competition