Strike Industries AR Castle Nut

The Strike AR Castle Nut is machined from AISI 4140 steel and surface heat-treated to 45-50 HRC for robustness and durability. Its manganese phosphate finish provides an attractive matte black appearance and excellent resistance to corrosion and wear. When paired with the Strike Industries Multi-Function End Plate, there’s no need for peening or staking, simplifying installation. Additionally, the nut features wrench cutouts for easy installation with a castle nut wrench, and its Mil-Spec dimensions ensure compatibility with AR-15 and AR-10 receiver extensions/buffer tubes. Start your new build or enhance a current rifle setup with the Strike AR Castle Nut so the receiver extension/buffer tube stays in place during operation. Specifications for Strike Industries AR Castle Nut: Manufacturer: Strike Industries Color: Black Features of Strike Industries AR Castle Nut No peening or staking needed when paired with SI MultiFunction End Plate Heattreated surface to 4550 HRC Manganese phosphate finish Machined from AISI 4140 steel Castle nut wrench cutouts for installation MilSpec dimensions for AR15/AR10 receiver extensions/buffer tubes Package Contents: Strike Industries AR Castle Nut