LBE Unlimited ARBNT Barrel Nut Black 4130 Steel AR-15

The LBE Unlimited ARBNT Barrel Nut is a standard AR-15 barrel nut machined from 4130 steel and finished in black. It is purpose-built to thread onto a standard AR-15 upper receiver and lock the barrel extension securely in place, providing the solid foundation needed for accurate shooting and reliable handguard retention.

Constructed from 4130 steel with a mil-spec profile, this barrel nut is Made in the USA and ready to drop into your next AR-15 build. The black finish protects against corrosion and wear during repeated assembly and armorer's work. Whether you are assembling a new upper from scratch or replacing a worn or damaged original, the ARBNT delivers the straightforward, no-nonsense fit expected of a standard AR-15 barrel nut.