The Daniel Defense Bolt-Up System Barrel Nut is designed to work with the Bolt-Up Plates used in mounting the following handguards:
RIS II
RIS III
DDM4 Rail
MFR and MFR XL
AR15 Lite Rail, AR15 Lite Rail II, AR15 Lite Rail III
SLiM Rail
They are precision machined from 4140 steel and have a Mil-Spec Heavy Phosphate finish. This barrel nut will work on standard AR-15, M-4, and M-16 pattern upper receivers and barrels. Comes in factory bag as shown.
This barrel nut will not work with AR-10 / SR-25 / .308 sized rifles.
