Glock 20 Gen3 full-size 10mm Auto. The most widely carried large-bore field and woods pistol for protection against dangerous game. 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: Field, Woods Carry, Service, Hunting