Shop › KYNSHOT BUFFER FOR AR9 3.5"-7.5" BBL KYNSHOT BUFFER FOR AR9 3.5"-7.5" BBL $154.99 KynSHOT RB5007 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 3.5"-7.5", Stainless Steel Construction, Silver RB5007 Quantity: Add To Cart Added! KynSHOT RB5007 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 3.5"-7.5", Stainless Steel Construction, Silver RB5007