The M5E1 Handguard Barrel Nut is used to connect Aero Precision M5 Enhanced Handgaurds to DMPS pattern threaded upper receivers. This product comes with 5 shims to properly time the gas tube with the upper receiver.

Includes:

• M5E1 Handguard Barrel Nut
• Shim Pack (5 shims)

Features:

• Material: Machined from 1144 Stressproof® Steel
• Coating: QPQ/Melonite
• Torque to 65 ft lbs with a standard AR15 armorer's wrench

Please Note: If you intend to connect an Aero Precision Handguard to a standard threaded upper receiver(DPMS Thread), you will need a M5E1 Handguard Barrel Nut.

If you have our M5E1 Enhanced Upper Receiver, you do not need a M5E1 Handguard Barrel Nut as the barrel nut and rail mounting platform are forged directly on to the upper receiver itself.