The GLOCK 17 Gen4 FS, in 9x19, adds several enhanced features to the world's most popular pistol, including front cocking serrations, steel sights, Extended Slide Stop Lever and Extended Magazine Catch. The front cocking serrations provide a different look and an additional tactile surface choice when manipulating the slide. The extended controls make it easier to change magazines and operate the slide. The GLOCK 17 Gen4 FS also includes all of the special Gen4 features shooters love, including Modular Back Straps, Gen4 rough textured technology on the frame, and a dual recoil spring assembly which reduces felt recoil and substantially increases the spring's service life. The G17 Gen4 FS 9x19mm pistol also retains the GLOCK accessory rail for accessory attachments.