The LBE AR-15 Castle Nut is built for secure and reliable buffer tube installation. Precision machined from durable 4140 steel and finished with a corrosion-resistant magnesium phosphate coating, it’s designed to withstand hard use while maintaining proper receiver extension retention.
Manufactured to mil-spec standards, this castle nut ensures proper fit and dependable performance on AR-15 platforms. Made in the USA, it’s an essential component for new builds, upgrades, or routine maintenance.