LBE Unlimited Castle Nut AR-15 - ARCNUT

LBE Unlimited ARCNUT AR-15 Castle Nut

The LBE Receiver Extension Nut with 4140 steel construction and manganese phosphate coating.

This circular and notched nut for sale at Mister Guns is designed to screw onto the AR-15 lower receiver extension (buffer tube) and keep the receiver extension and lower receiver end plate secured in place.

To ensure superior wear and corrosion resistance, as well as a long service life, the ARCNUT is made of 4140 steel and coated with manganese phosphate.