The Yankee Hill Low Profile Gas Block replaces the existing front sight and provides a simple, streamlined design that can be used to mount a rifle length forearm to a carbine length barrel. Available with either a two set screw mounting system (#335471) or a clamp-on style mounting system(#462151). The Yankee Hill Machine Low Profile Gas Blocks measure .950 Inches long and are manufactured from high quality steel, then finished with a Mil-Spec phosphate coating. Does not include roll pin. Proudly made in the U.S.A.
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