Glock 21SF slim-frame variant reduces the grip circumference of the standard G21 for shooters with smaller hands. Otherwise identical to the G21 Gen3. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 13 Year introduced: 2007, Austria Weight: 26.28 oz Overall length: 7.59" Status: Active Intended use: Service, Duty, Home Defense