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

The LBE Unlimited ARBNT308 is a dedicated .308 barrel nut built specifically for the AR-10 platform. It is machined from 4130 chromoly steel, giving it the strength, toughness, and heat resistance needed to lock a .308 barrel solidly into the upper receiver during a build or replacement service.

A black phosphate finish coats the entire nut for a corrosion-resistant, matte, non-reflective surface that holds up to hard use in the field or on the range. The ARBNT308 is engineered to deliver a wobble-free fit for your rifle barrel, helping you achieve a properly timed, secure installation every time you torque it down.

Whether you are completing a fresh AR-10 build or replacing a worn barrel nut on an existing rifle, the LBE Unlimited ARBNT308 provides a reliable, precision-machined solution for the .308 AR platform. Proudly made in the USA.