Almost perfect - Aero Precision AR-15 BAR Barrel Nut and Shims

This barrel nut is wonderful for attaching any 'enhanced' handguard to a regular threaded upper receiver. However, you have to be sure that your AR armorer's wrench has those three round pegs protruding out, in order for it to fit this barrel nut; because not all armorer's wrenches are the same... Also, the eight Hex screws that screw into this barrel nut are not included; the Aero Precision handguard should have included them instead.