Another great product from aero precision - Aero Precision AR-15 BAR Barrel Nut and Shims

I picked up an enhanced handguard from Aero and needed the BAR barrel nut so it could fit on my Ballistic Advantage barrel set-up. Great fitment and good quality. Includes all hardware needed for install, including 4 shims if you need some adjustment for the gas tube.

I recommend putting on some lube on the outside of the barrel nut when attaching an advanced handguard from Aero. The fitment is tight and the lube will help if you need to take it off in the future or shift the alignment.

10/10 would purchase again