Bravo Company USA CASTLE-NUT-AR15 Receiver Extension Nut (Castle Nut)

M4 / AR Castle Nut, Receiver Extension (Buffer Tube) castle nut. Matte black finish.

For your AR15, M16, M4 Pistol Lower Receiver. Pistol receiver extension (buffer tube) machined from 7075T6.

BCM MK2 Receiver Extension for your AR15, M16, M4. Machined from 7075T6 and manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extensions have a slightly smaller dimension...

The Thin Castle Nut Wrench is designed to work with most pistol buffer tubes and pistol braces. The Master-Fit Thin Castle Nut Wrench is purpose built and specialized for precise fitment to...

Master-Fit Extended & Standard Castle Nut Wrench