Mil-Spec AR-15 Castle Nut

Mil-Spec AR-15 Castle Nut Description

This Mil-Spec Castle Nut fits all AR-15 and AR-10 patterned firearms. The steel nut features a corrosion resistant black finish and is used in the buffer assembly. This castle nut is easy to install and is a high quality standard Mil-spec part for any AR-15 or AR-10.