Limbsaver Prefit Recoil Pads are easily installed after removal of existing stock pad. These recoil pads offer innovative recoil reduction technology that absorbs recoil and vibration through a unique three step process using a proprietary material NAVCOM. The superior Limbsaver recoil reduction system allows greater access to the shooting sports. May require minor fitting on some models. Made to fit synthetic stocks only. Mounting screws not included. Notes:Fits all of the Collapsible stocks made by Magpul and MOE Fixed Carbine Stock. Does NOT fit MOE Fixed Rifle Stock or PRS Stock. Fits synthetic stocks only.