Features: CASV-14 comes in the highly requested Extended Length Rail extends all the way back to the rifle's stripper clip guide Aircraft aluminum alloy construction with steel mounting hardware Will not interfere with any Mil-spec (wood or fiberglass) or aftermarket buttstock assembly Three secured mounting points; on at the stripper clip guide, the second at the rear of the barrel, and the third around the operating rod guide From the operating rod guide forward, the CASV-14 does not touch the barrel Fits most platforms, except for some heavy barrel systems, including National Match, M21 and M25 systems. Standard Milspec barrel configurations only Mfg: Vltor Weapon Systems