The LimbSaver AirTech Recoil Pad is available as a slip-on option for most rifles, shotguns and muzzleloaders. It features advanced atmospheric chambers that produce a substantial increase in performance through uniform energy dissipation, and it incorporates anti-muzzle jump technology for faster target re-acquisition. The recoil pad reduces recoil by 70% percent and helps increase accuracy. Designed to easily slip over existing firearm stocks without any modifications, the AirTech Recoil Pad will work best with removing the current factory recoil pad before installation. The AirTech Slip-On can be installed directly over the factory recoil pad to increase the length-of-pull by 1, but to achieve optimum performance, LimbSaver recommends the removal of the existing factory recoil pad. *Medium fits stocks measuring 4 13/16 x 1 5/8 to 5 1/8 x 1 3/4.