Complete front sight assembly, all of the front sight hardware and the front sling loop are pre-installed, so the only thing left to do is drill and pin the assembly to your barrel. Designed for barrels with .750" diameter gas journals approximately 2" long. "F" marked designating for use with flat-top style upper receivers(~.040" taller than a standard front sight).
Must be installed on to the barrel, then drilled with the barrel in place and finally pinned in place with the barrel. Requires gunsmithing.