The Tapco AR-15 Castle Nut (brand part no. TAP22060) is a standalone replacement castle nut sized for standard AR-15 receiver extension threads.

Key Specifications

• Functions as a castle nut, threading onto the receiver extension to lock the buffer tube in place against the lower receiver.
• Fits standard AR-15 receiver extension threads.
• Sold under the Tapco parts line.

Frequently Asked Questions

What does a castle nut do? It threads onto the receiver extension and locks the buffer tube in place against the lower receiver.

Does this fit standard AR-15 buffer tubes? Yes, it is sized for standard AR-15 receiver extension threads.

Buy the Tapco AR-15 Castle Nut

Replace or upgrade the castle nut securing a buffer tube on an AR-15 lower. Browse more of our rifle parts selection. Order the Tapco AR-15 Castle Nut from a Lubbock, TX gun shop; we’ll get it moving to you as soon as it is ready to ship.