The Glock 39 MOS is the optics-ready subcompact .45 GAP Glock, the smallest and rarest of the .45 GAP MOS variants. It was produced in very limited numbers and represents the final chapter of the .45 GAP Glock lineup. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: .45 GAP Capacity: 6 Year introduced: 2017, Austria Weight: 19.33 oz Overall length: 6.29" Status: Discontinued Intended use: sport, self_defense