The LBE Unlimited Mil-Spec Buffer Tube Kit (brand part no. MILBUFKT) covers the complete rear end of an AR-15 carbine build in one package. LBE Unlimited, a leading producer of US-made gun parts, includes a six-position mil-spec diameter buffer tube, a carbine-length recoil spring, a standard carbine buffer, a receiver end plate, and a castle nut. Among AR buffer system parts, this kit favors builders who want every buffer-assembly component sourced together in true mil-spec dimensions.

Key Specifications

• The tube is a six-position, mil-spec diameter receiver extension.
• Includes a carbine-length recoil spring and standard carbine buffer.
• Includes the receiver end plate and castle nut.
• Made in the USA by LBE Unlimited.
• Finished in black.

Frequently Asked Questions

Is this tube mil-spec or commercial diameter? Mil-spec diameter, so it fits mil-spec pattern adjustable stocks.

What else do I need to finish the buffer assembly? Nothing — the kit includes the tube, spring, buffer, end plate, and castle nut.

Buy the LBE Unlimited Buffer Tube Kit

A complete mil-spec carbine buffer assembly in one box is exactly what this LBE kit delivers. Order it from our Lubbock, Texas gun shop and it ships fast to your door.