The AR15 Bar Barrel Nut is used to connect BAR style handguards to standard threaded upper receivers. This product comes with 4 shims to properly time the gas tube with the upper receiver.

Compatible with mil-spec threaded upper receivers ONLY.

Includes:

• BAR Barrel Nut
• BAR Shim Pack (8 shims)

Features:

• Material: Machined from Billet 7075-T6 Aluminum
• Coating: Anodized Black
• Torque with standard AR15 armorer's wrench (Does not work with Magpul® Armorer's Wrench)
• Supports Mil-Spec AR-15 barrels with outer diameters up to .998”

View BAR Barrel nut instructions here.

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 our 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.