The KynSHOT RB5020SS Recoil Buffer is a hydraulic buffer system designed and optimized for competition shooters who would like to get quicker sight recovery and follow up shots when shooting with their competition PCC's. Designed in cooperation with Blitzkrieg Components the RB5020SS provides longer length and more weight for those who desire a short stroke competition action. With a length of 5.3", this buffer will shorten the stroke of the bolt by 1.3" when installed in a standard AR15 carbine buffer tube. When installed in an AR10/A5 carbine buffer tube this buffer will shorten the stroke of the bolt by .5", which can be increased by the addition of spacers. The damping level of this buffer is intended for lighter, competition type 9mm ammunition loadings for best performance and longest service life.