Description
The JE Machine Tech TS-ABT8 Mil-Spec Castle Nut is a precision-machined steel component designed to secure the carbine buffer tube to the lower receiver of an AR-15. Built to true Mil-Spec dimensions, this drop-in castle nut provides the correct fit and engagement for the platform’s buffer retaining system.
Cut from steel and finished in a black oxide coating, the TS-ABT8 delivers the durability and corrosion resistance expected from a small but critical interface part. It is compatible with all Mil-Spec carbine buffer tubes and end plates, and works with a standard AR-15 castle nut wrench. Whether you are building a complete lower from the ground up or replacing a worn castle nut during routine service, this is a straightforward, reliable choice from JE Machine Tech.
Key Features:
- Precision-machined steel construction with black oxide finish
- True Mil-Spec dimensions for proper buffer tube timing
- Secures carbine buffer tube to AR-15 lower receiver
- Compatible with standard AR-15 castle nut wrenches, Mil-Spec buffer tubes, and end plates









