The RB5100 KynSHOT Tactical Shotgun Recoil Buffer is designed for use with most 12 or 20 gage shotguns. Requires an adapter [not included/ order separately]. The RB5100 KynSHOT Tactical Shotgun Recoil Buffer features the latest advances in recoil management, allowing users to stay tighter on target, reduce muzzle lift and felt recoil as well as decreasing time to reacquire the target objective. For higher caliber rifles, KynSHOT dampers are available for replacement of the short 2.5” standard mass buffer as well as the standard 3.25” collapsible stock, and full-length fixed stock buffers. These additional applications strengthen the current product lineup that accompanies carbine collapsible stock and fixed stock for AR-15 rifles. All three higher caliber .308 options are now available. Built using mil-spec standards, KynSHOT hydraulic recoil dampers outperform the best standard mass and spring buffer technologies currently available and deliver better reduction than competing aftermarket devices. An exclusive, stainless steel construction provides maximum resistance to corrosion, while KynSHOT long-life seals and high performance hydraulic oils ensure product longevity and performance in a range of extreme temperatures and harsh operating environments.