The STI HEX Tactical is a late-generation 2011 double-stack pistol featuring a 5-inch barrel, optics-ready slide with a direct-mount HEX optic footprint (shared with Trijicon SRO), steel slide with DLC coating, and the STI action. The HEX represents the final evolution of the STI product line before the company rebranded as Staccato in 2021. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 17 Year introduced: 2019, USA Weight: 38.5 oz Overall length: 9" Status: Discontinued Intended use: Tactical, USPSA Production, Competition