This Glock 19 Gen 4 in 9x19, introduces revolutionary design changes to the pistol that has found worldwide acclaim with security services both private and public. Its modular back strap design lets you instantly customize the grip to adapt to an individual shooter's hand size. The surface of the frame employs the new 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.