The STI LS9 (Light Signature 9mm) is a double-stack 2011-format lightweight carry pistol featuring an aluminum frame, 3.0-inch barrel, and a weight of approximately 22 oz unloaded. It is the most compact and lightest STI 2011 format pistol produced before the Staccato rebrand, designed for deep concealment carry while providing the 2011 trigger quality and double-stack capacity. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 12 Year introduced: 2014, USA Weight: 22 oz Overall length: 6" Status: Discontinued Intended use: CCW, Deep Concealment