Luth-AR BL-F14-7 5.56 NATO 14.5" 1:7 SOCOM Barrel w/ F-Marked FSB

The Luth-AR BL-F14-7 is a SOCOM-profile AR-15 barrel assembly chambered in 5.56 NATO, built around a 14.5" barrel with an installed F-marked front sight base. Designed as a drop-in component for carbine builds, it combines a battle-proven profile, modern steel specification, and a chrome-lined bore in one ready-to-install package.

Constructed from 4150 Chrome Moly Vanadium steel and finished in manganese phosphate, this barrel is chrome lined for long-term durability and corrosion resistance. The familiar M4 SOCOM contour keeps weight and handling consistent with the rifles it replicates, while the 1:7 twist stabilizes the full range of 5.56 NATO projectile weights.

Arriving ready to install with a pre-installed F-marked front sight base, the BL-F14-7 mates with most carbine-length handguard systems and a standard barrel nut and upper receiver. Note: the front sight post is not included.

Whether you are assembling a clone-correct M4 carbine, refreshing a worn factory barrel, or building a hard-use defensive rifle, the Luth-AR BL-F14-7 delivers SOCOM-profile handling, 4150 CMV construction, and an integrated F-marked FSB in a single AR-15 barrel assembly.