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Windham Weaponry
HANGUARD CAP ROUND HEAVY M4
This Hand Guard Cap is the Round, Heavy M4 type for use with carbine length handguards on the AR15/M16. Center hole diameter is .750" for the M4 barrel. An upper oblong hole accommodates the gas tube, and lower cutouts allow fitting a grenade launcher. Stamped steel construction with black manganese phosphate finish - made in the USA.