Strike Industries AR Castle Nut SI-AR-CN-BK Color: Black,

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:

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