MAKE SURE YOU SELECT THE CORRECT VERSION WHEN CHECKING OUT. MCH Compatible with SW M&P Mod 1 & 2 9/40 Full Size Models Only *Does not fit Shield Models*. The Recover Tactical compatible with the Glock Slide Racking Assist aids with racking the slide. Instruction is simple and requires no permanent modifications to your firearm and takes minutes to install without the need for a gunsmith. Safety check your firearm, insert the lower and upper parts of the charger to the slide serrations, and secure with supplied hardware. It's that simple. Features: Allows for a more ergonomic charge of your gun. No protruding parts to snag on clothes or holster. Simple installation. Won't damage your firearm. Glass reinforced polymer