The Glock 17 Gen4 introduces revolutionary design changes to the world's most popular pistol. The modular backstrap design lets the user to adapt the grip to hand size, and the frame surface exhibits the scientifically-designed Gen4 rough textured technology. This model features a dual-recoil spring assembly that substantially increases the life of the system, and the enlarged reversible magazine catch easily accommodates left- or right-handed operators. The G17 Gen4 retains the Glock accessory rail for accessory attachment. This G17 Gen4 model has a 10-round capacity. It features front slide serrations, Glock night sights, and extended controls (magazine catch).