Kynshot RB5000 Stainless Steel AR-PlatformThe KynSHOT RB5000 Recoil Buffer is a hydraulic buffer system designed and optimized to fit any AR 15 using a Mil Spec style carbine buffer tube (internal depth 7"). The RB5000 can be paired with any style buffer spring, and is a simple drop in replacement for all buffer systems on the market. The buffer absorbs the recoil impulse from the bolt carriers rearward motion, preventing bolt bounce as a new round is chambered. The RB5000 reduces felt recoil