Glock 21 Gen3 MOS with factory optic cut. Provides factory red-dot mounting on the full-size .45 ACP platform for competition and duty use. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 13 Year introduced: 2016, Austria Weight: 26.28 oz Overall length: 7.59" Status: Active Intended use: Competition, Service, Duty