STI Steel Master in 38 Super. A Steel Challenge-specific competition pistol chambered in 38 Super, used by competitors who also compete in IPSC Open with 38 Super and want to practice Steel Challenge with the same platform. The 38 Super Steel Master uses the same compensator design as the 9mm variant but tuned for the slightly higher gas volume of 38 Super. Type: Pistol Action: Semi-Automatic Caliber: 38 Super Capacity: 17 Year introduced: 2004, USA Weight: 38 oz Overall length: 8" Status: Discontinued Intended use: Steel Challenge, USPSA Open, Competition