LBE Unlimited AR-10 Barrel Nut 4130 Steel Black Phosphate ARBNT308

The LBE Unlimited AR-10 barrel nut is the critical interface between your upper receiver and barrel assembly. Built from 4130 steel with a black phosphate finish, this .308 barrel nut handles the torque demands of AR-10 platforms while resisting corrosion—whether you're zeroing a precision rifle, running a competition build, or maintaining a reliable field gun. American-made quality at a price that doesn't demand you compromise.

Proper barrel nut installation is foundational to AR-10 accuracy and reliability. A quality nut ensures your barrel seats consistently and your receiver stays true. LBE Unlimited's 4130 steel construction and phosphate finish deliver the durability and corrosion resistance you need in a platform that gets real use—from the range to hunting applications.

Whether you're assembling your first AR-10, replacing a worn component, or stocking spare parts, this barrel nut is a straightforward, no-frills essential. Made in the USA, it's the kind of part that works quietly in the background, year after year.

Key Features

• 4130 steel construction for durability and reliable performance
• Black phosphate finish resists corrosion in field conditions
• Designed for .308/AR-10 platform compatibility
• Made in the USA

Specifications

Frequently Asked Questions

What AR platform is this barrel nut designed for?

This is a .308 barrel nut engineered for AR-10 and large-frame AR platforms chambered in .308 Winchester and compatible cartridges.

Will this work on a standard AR-15?

No. AR-15 and AR-10 barrel nuts are different sizes and are not cross-compatible. This .308 nut is sized for AR-10 receivers only.

Does the black phosphate finish require maintenance?

Phosphate is a proven, low-maintenance finish that resists corrosion. Standard rifle maintenance and storage practices will keep it in good condition.

Is this a complete barrel assembly or just the nut?

This is the barrel nut component only. You'll need a barrel and upper receiver to complete the assembly.