The LBE Unlimited Barrel Nut (brand part number ARBNT308) is a 4130 steel barrel nut finished in black phosphate and built for AR-10/.308 Win uppers. It threads onto the upper receiver to lock the barrel extension in place and index the handguard, and 4130 steel construction holds up to the torque and heat cycling that part sees at the barrel-to-receiver joint.

Key Specifications

• 4130 Steel Construction.
• Black Phosphate Finish.
• AR-10/.308 Win Platform Fitment.
• Secures The Barrel Extension to the upper receiver and indexes the handguard.

Frequently Asked Questions

What platform is this barrel nut for? AR-10/.308 Win.

What is it made of? 4130 steel, finished in black phosphate.

Buy the LBE Unlimited Barrel Nut

Get your AR-10 build’s barrel torqued down right with an LBE Unlimited Barrel Nut from our AR upper parts selection. Order online and we will ship it straight to your door from our Lubbock, Texas gun shop.