KAC-Knight's Armament SR15 URX Barrel Nut Wrench For Old Style Castle Nut

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Knight's Armament URX barrel nut wrench is required for installation or removal of SR15/AR15 (5.56mm) URX rails with castle type barrel nut. Wrench is used in conjunction with a standard AR-15 barrel nut wrench. We also offer installation under our Shop Services, Labor category. *Does not fit the newer style scalloped barrel nut that now comes with the URX.