KynSHOT Recoil Buffer Stainless Steel H&K MR762. The RB5030 can only be paired with the H&K MR762 and is a simple drop-in replacement for all buffer systems on the market. The buffers patented technology absorbs the recoil impulse from the bolt carriers rearward motion preventing bolt bounce as a new round is chambered. The RB5030 reduces felt recoil by 30percent improving the shooters overall accuracy and eliminating muzzle flip. Specifications for KynSHOT RB5030 Recoil Buffer Stainless Steel H&K MR762: Manufacturer: KynSHOT Fabric/Material: Stainless Steel KynSHOT RB5030 Recoil Buffer Stainless Steel H&K MR762