Product Summary
The Aero Precision Castle Nut is a high-strength, heat-treated steel lock nut designed to securely fasten your buffer tube to the lower receiver. It features a corrosion-resistant coating and is fully compatible with standard MIL-SPEC carbine buffer tubes. This component is essential for ensuring a stable and secure setup for your stock or brace on AR-15 and AR-10 platforms. Whether you are starting a new build or replacing old hardware, it provides a precision fit and rugged reliability.
