Gen4 full-size 9mm with factory Modular Optic System (MOS) slide cut. The first full-size Glock with factory optics capability. Four adapter plates included for compatibility with Docter, Meopta, Trijicon RMR, Leupold DeltaPoint Pro, and similar red dot sights. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: 9mm Luger Capacity: 17 Year introduced: 2014, Austria Weight: 25.17 oz Overall length: 7.44" Status: Discontinued Intended use: service, law enforcement, competition, duty