GLOCK INC Gen 4 Glock UG2250203 G22 Gen 4 Double 40 Smith & Wesson (S&W) 4.4″ 15+1 Black This Glock 22 Gen 4 in 40SW, introduces revolutionary design changes to this model of perfection that the majority of law enforcement across the country put their trust in every day. Its modular back strap design lets you instantly customize the grip to adapt to an individual shooter’s hand size. The frame employs the scientifically designed, real-world-tested, Gen 4 rough textured technology. Internally, the dual recoil spring assembly substantially increases the life of the system. A reversible enlarged magazine catch, changeable in seconds, accommodates left- or right-handed operators.