Advanced Technology AR-15 Castle Nut A5101020

AR-15 Castle Nut for Buffer Tube Assembly

The Advanced Technology A5101020 castle nut is a critical component in any AR-15 build or maintenance project. This mil-spec steel nut secures your buffer tube assembly with the reliability and durability you demand.

Key Features

• Mil-spec steel construction — Built to withstand years of use and abuse
• Universal compatibility — Works with commercial, military, and hybrid buffer tubes
• Black finish — Corrosion-resistant coating
• Precise manufacturing — Ensures proper fit and function

Compatibility

This castle nut fits most AR-15 and AR variant platforms. It is not compatible with .308 rifles or other large-frame platforms.

Why It Matters

The castle nut may seem like a small detail, but it plays a vital role in keeping your buffer tube assembly secure. Advanced Technology's commitment to quality manufacturing means you get a component that will perform reliably through countless rounds and shooting sessions. Whether you're building a new rifle or maintaining an existing one, this is the kind of part that deserves your attention.