The GLOCK 17&19 Gen4 FS, in 9×19, 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 & 19 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 & G19 Gen4 FS 9x19mm pistol also retains the GLOCK accessory rail for accessory attachments.