The Midwest Industries two-piece free floating rail is a drop in solution for your AR-15. Installation does not require the removal of the factory barrel nut, barrel, or gas block, simply cut off the delta ring. The rail clamps on to the factory barrel nut and provides a true free floating rail. The rails are Mil-Spec 1913 and T-marked for easy location of accessories. The top rail is designed to match standard A4 flat-top uppers and provide a continuous rail. The forend is constructed of 6061 aluminum and hard coat anodized in matte black.