Glock introduced the G22 chambered in 40 S&W to effectively close the gap between the 9mm and the 45 Auto. Glock was the first manufacturer to make this popular and effective round accessible to law enforcement agencies. The GLOCK 22 Gen4, in .40, introduces revolutionary design changes to this model of perfection that the majority of law enforcement across the country put their trust in every day. The Modular Back Strap design of the G22 Gen4 lets you instantly customize its grip to adapt to an individual shooter’s hand size. The surface of the frame employs the new scientifically designed, real-world-tested, Gen4 rough textured technology. Internally, the new GLOCK 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. The G22 Gen4 .40 caliber retains the GLOCK accessory rail for your attachments.