Lockhart Tactical AR10 Buffer Recoil Spring***THIS IS A DIFFERENT LENGTH AND STIFFNESS THAN AR15 ***Fits: All AR15 Mil-Spec / Commercial Carbine Buffer TubesAll AR10 Mil-Spec / Commercial Carbine Buff
The TUBE RAIL KIT, part number BT33 consists of a Steel Bar Nut that is designed to fit inside free float tubes and a low profile 1913 Picatinny rail 2.050" long with a 1.00 radius back and 1.602 betw