Glock, OEM Extended Slide Stop Lever and Spring, Fits Glock G17, G19, G19X, G26, and G34 MOS Gen5. The completely redesigned Glock Gen5 Extended Slide Stop Lever is thicker and more robust than in previous generations, and the thumb tabs have a tad more outward angle to give you better contact for more positive operation. Its a factory replacement for a worn or broken original part on your Gen5 pistol. The Gen5 Extended Slide Stop Lever is fully ambidextrous, making it easy to release the slide with whichever hand you prefer. Glocks Gen5 Extended Ambidextrous Slide Stop Lever comes with a coil spring instead of the flat-wire spring used in previous models, for enhanced reliability and longer service life.