Complete your AR15 carbine build with the BATTLEARMS AR15/M16 Receiver Extension Castle Nut, a Mil-Spec receiver extension lock nut designed for use with an adjustable stock. This essential small component helps secure the receiver extension assembly, making it a practical choice for a new build or a replacement when an existing nut is worn or due for service.
Whether you are assembling a carbine or refreshing compatible parts, this AR15/M16 castle nut offers a straightforward fit for its intended application. Keep one on hand for your parts kit, replacement needs, or next project, and choose a component made in the USA by BATTLEARMS.
- Mil-Spec receiver extension lock nut, also known as a castle nut
- Designed for AR15 carbines with an adjustable stock
- Suitable for a new AR15/M16 build or as a direct replacement for a worn part
- Made in the USA
- Compact, essential hardware for compatible receiver extension assemblies
Choose the BATTLEARMS AR15/M16 Receiver Extension Castle Nut for a dependable, USA-made addition to your compatible carbine parts selection.
