Short Frame G21 with reduced grip circumference, introduced before the Gen4 backstrap system as a more concealable alternative to the standard G21. The SF frame reduces front-to-back grip distance, making the G21 accessible to a wider range of hand sizes. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 13 Year introduced: 2007, Austria Weight: 29.28 oz Overall length: 7.59" Status: Active Intended use: Law Enforcement, Service, Home Defense