AR15 BAR Barrel Nut and Shims

The AR15 BAR Barrel Nut is used to connect Aero Precision BAR style handguards to standard threaded upper receivers.

Product Description

The AR15  BAR Barrel Nut is required for Aero Precision BAR style handguards.  This Barrel Nut is compatible with only Mil-Spec Upper Receivers.  Comes with (1) BAR Barrel Nut and a BAR Shim Pack (4 shims).  The shims are used to clock the Barrel Nut in order to align the cleance holes with the gas tube.

Please Note: All Aero Precision Handguards use the BAR interface. If you intend to connect an Aero Precision Handguard to a standard threaded upper receiver, you will need a BAR Barrel Nut. If you have an M4E1 Enhanced Upper Receiver, you do not need a BAR Barrel Nut as the barrel nut and rail mounting platform are forged directly on to the upper receiver itself. *Recommended torque settings between 30 - 45 ft lbs. Torque over 45 ft lbs may result in damage to the barrel nut.


  • 7075-T6 Aluminum
  • Black Anodize coating
  • Torque with standard AR15 Armorer's wrench (does not work with Magpul Armorer's wrench) - not included
  • Supports Mil-Spec AR15 Barrels with outer diameters up to .998 inch

Aero Precision USA
2.24 oz
Sight Style
Front Only

Sign up for new ways to Gear Up. Zero In.

Receive updates on new products, special offers and interesting fieldnotes.