GLOCK 20 Gen4 The GLOCK 20 Gen4 delivers a formidable force downrange with high accuracy over a long distances. The use of GLOCK hi-tech polymer considerably reduces felt recoil even in this heavy caliber. For the hunting community, this 10 mm Auto is a reliable companion providing a safe and accurate finishing shot, even when hunting big game. The Modular back strap system makes it possible to instantly customize its grip to accommodate any hand size. The reversible magazine catch makes it ideal for left and right-handed shooters. 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 10 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.