Full-size SIG 1911 with stainless frame and slide — STX designation for stainless/two-tone construction. Enhanced sights and trigger over base 1911. Type: Pistol Action: Single-Action Caliber: .45 ACP Capacity: 8 Year introduced: 2008, USA Weight: 35 oz Overall length: 7.3" Status: Discontinued Intended use: Competition, Personal Defense