Gen 4 full-size .357 SIG adds RTF2 texture, dual recoil spring assembly, reversible enlarged magazine release, and interchangeable backstraps. Continued law enforcement adoption through the Gen 4 production period. Type: Pistol Action: Semi-Automatic Caliber: .357 SIG Capacity: 15 Year introduced: 2010, Austria Weight: 23.28 oz Overall length: 7.95" Status: Active Intended use: Law Enforcement, Duty Carry, Home Defense