Barrel Nut – Bolt-Up System

The Daniel Defense Bolt-Up System Barrel Nut is designed to work with the Bolt-Up Plates used in mounting the RIS II, DDM4 Rail, MFR and MFR XL, AR15 Lite Rail, AR15 Lite Rail II, AR15 Lite Rail III, and SLiM Rail.  They are precision machined from 4140 steel and have a Mil-Spec Heavy Phosphate finish.  It is designed to be torqued down or removed with the Bolt-Up System Barrel Nut Wrench (Sold Separately).  This barrel nut will work on standard AR-15, M-4, and M-16 pattern upper receivers and barrels.