The LMT MWS 7.62×51 NATO 13.5” Carbine-Length Barrel in Black (LMT part no. R-LM308B413) is a factory-spec .308-caliber barrel built for the LMT MWS upper receiver platform, giving shooters a shorter, more maneuverable option for an SBR or suppressed 7.62×51 build. The 1-in-10 twist stabilizes standard-weight 7.62×51/.308 Winchester bullets used in common hunting and duty loads. At 13.5 inches, this barrel trades some velocity for a shorter overall rifle length, a common trade-off on close-quarters .308 builds. LMT manufactures it to the same spec as the barrels found on its complete MWS rifles.

Key Specifications

• Measures 13.5 inches long, a shorter option for compact 7.62×51 carbine builds.
• Chambered in 7.62×51 NATO, compatible with common .308 Winchester ammunition.
• Rifled with a 1-in-10 twist, suited to standard-weight 7.62×51 bullets.
• Built for the LMT MWS upper receiver platform, and finished in black.
• Paired with a carbine-length gas system for reliable 7.62×51 cycling at this length.
• Compatible with LMT’s MWS upper receiver platform.
• Uses a standard barrel extension compatible with mil-spec 7.62×51 bolt carrier groups.

Frequently Asked Questions

Is a 13.5-inch barrel an NFA-regulated length? Barrels shorter than 16 inches on a rifle-configured receiver generally require NFA registration as a short-barreled rifle; confirm your specific build’s configuration and paperwork before assembly.

Does this barrel fit LMT’s own MWS uppers? Yes, it’s built to mate directly with the LMT MWS upper receiver system.

Buy the LMT MWS 7.62×51 NATO 13.5-inch Carbine-Length Barrel, Black

Shop the LMT Defense 13.5-inch barrel in our AR barrels selection, with fast, insured shipping from our Lubbock, Texas gun shop.