The STI Duty One is a 2011-format duty pistol designed for law enforcement and military use, featuring a commander-length 4.5-inch barrel, standard fixed sights, and a stainless steel slide on a 2011 modular frame. The Duty One was STI's most direct attempt to compete in the duty and service market against Glock and SIG with the 2011 platform. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 17 Year introduced: 2012, USA Weight: 35 oz Overall length: 8.25" Status: Discontinued Intended use: Duty, Service, Law Enforcement