Shop › KYNSHOT BUFFER FOR AR9 HD 8" BBL KYNSHOT BUFFER FOR AR9 HD 8" BBL $154.99 KynSHOT RB5015HD Hydraulic Recoil Buffer, Fits AR-9 Style PCC's Using a Mil-Spec Style Carbine Buffer Tube (Internal Depth 7") and a Barrel Length of 8" or Above, Stainless Steel Construction, Silver RB5015HD Quantity: Add To Cart Added! KynSHOT RB5015HD Hydraulic Recoil Buffer, Fits AR-9 Style PCC's Using a Mil-Spec Style Carbine Buffer Tube (Internal Depth 7") and a Barrel Length of 8" or Above, Stainless Steel Construction, Silver RB5015HD