The G20 is Glock's full-size 10mm Auto, offering potent power for hunting and bear defense. The Gen 3 version remains the most common. Type: Pistol Action: Semi-Automatic Caliber: 10mm Auto Capacity: 15 Year introduced: 1991, Austria Weight: 30.69 oz Overall length: 7.59" Status: Active Intended use: Hunting, Outdoors, Home Defense