Glock Slide Stop Lever & Spring 9mm, .40 S&W, .357 SIG (Gen4 - NOT 2-pin G17, G17L, G34) #2912-X. This is a factory original Glock part. It is made to the same high standards in material and workmanship as the parts that originally came in your Glock firearm. This part is perfect to replace your worn or damaged parts, or to have as a spare to keep your Glock in top operating condition. Compatibility: Glock G17 Glock G19 Glock G22 Glock G23 Glock G24 Glock G26 Glock G27 Glock G31 Glock G32 Glock G33 Glock G34 Glock G35 Glock G43 Glock G45 Glock G48