The G31 is the full-size .357 SIG pistol on the G17/G22-sized frame, delivering bottlenecked high-velocity performance from a standard-capacity 15-round magazine. Gen 3 frame with finger grooves and rail. Adopted by select law enforcement agencies for its flat trajectory and terminal performance. Type: Pistol Action: Semi-Automatic Caliber: .357 SIG Capacity: 15 Year introduced: 1998, Austria Weight: 23.28 oz Overall length: 7.95" Status: Active Intended use: Law Enforcement, Duty Carry, Home Defense