Action: DAO - Caliber: 10mm - Capacity: 15+1 - Barrel Length: 4.6 - Finish: Black - Sights: Fixed - Grips: Polymer - Overall Length: 10.7 - Weight: 27.68 oz. The GLOCK 20 Gen4 in 10mm provides nothing short of massive firepower. The use of GLOCK hi-tech polymer considerably reduces felt recoil. With muzzle energy of 550 ft/lbs and a magazine capacity of 15 rounds this 10mm is your reliable companion on every hunt. The Gen4 edition now incorporates a wider selection of grip dimensions to make customizing your grip even more precise.