Full-size 10mm Auto Glock on a large frame slightly different from the .45 ACP G21. The G20 Gen3 provides the highest-energy output of any standard Glock model. Adopted by some LE agencies in bear-country jurisdictions and popular with hunters as a sidearm. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: 10mm Auto Capacity: 15 Year introduced: 1991, Austria Weight: 27.68 oz Overall length: 7.59" Status: Discontinued Intended use: hunting, outdoor, law enforcement, service