Castle Nut

The Sabal Arms Castle Nut, or Extension Buffer Tube Locking ring is critical in holding the receiver extension (buffer tube) in place.

Features / Specifications

• Steel Construction
• Mil-Spec Black Manganese Phosphate Finish
• Fits all standard Telestocks for AR15 and M16
• Designed for use with Armorer's Wrench

We've gone to the source to find you the best possible components, at the best possible price. All Sabal Arms branded products meet or exceed military specifications.