The Luth-AR 20 inches Bull Barrel Complete Upper Assembly (brand part no. FTBLB20M) pairs a heavy bull-profile barrel at 20 inches with a complete upper receiver, built for precision AR15 shooters who want the added rigidity and heat capacity of a bull barrel over a standard lightweight profile. The extra mass helps a barrel resist the point-of-impact shift that comes from heating up during a long shooting session, which matters for range and varmint shooters running strings of fire. It bolts onto any standard mil-spec AR15 lower to complete a heavy-barrel precision rifle. It is a strong option for builders chasing accuracy over ultralight weight.

Key Specifications

• The barrel measures 20 inches long.
• It uses a bull (heavy) barrel profile for added rigidity and heat capacity.
• It arrives as a complete upper assembly.
• It is built to bolt onto any standard mil-spec AR15 lower receiver.
• It is manufactured by Luth-AR, a maker of AR15 uppers and stocks.

Frequently Asked Questions

What is a bull barrel used for? A bull (heavy) barrel profile adds mass that helps resist point-of-impact shift as the barrel heats up during extended strings of fire.

What lower does this fit? It is built to bolt onto any standard mil-spec AR15 lower receiver.

Built by Luth-AR and sold in our AR15 uppers category, it is ready to bolt onto a mil-spec lower.

Buy the Luth-AR 20in Bull Barrel Complete Upper Assembly

Upgrade your build with the Luth-AR 20in Bull Barrel Complete Upper Assembly and get the fit, finish, and function serious shooters expect. Backed by our team at Schaefer Defense, Order it now from our Lubbock, Texas gun shop and it will ship as soon as it’s ready to go out the door.