The world's most advanced recoil pad is now available as a slip-on option for most rifles shotguns and muzzleloaders. It features advanced atmospheric chambers which produce a substantial increase in performance through uniform energy dissipation. No installation necessary just slip over the end of your firearm stock and feel the difference immediately.AirTech Slip-On pads are designed to slip over existing firearm stocks without any modifications. Though slip-on pads will work with or without factory recoil pads we highly recommend removing the existing pad before putting the slip-on recoil pad on; this will ensure the best fit and will prevent slipping during use.Large: 1" LOP 5-1/8" x 1-3/4" up to 5-3/8" x 1-7/8"