One Horse OH-BR05 AR-15 5.56 NATO 10.5" 1:7 Carbine Gas Barrel

The One Horse OH-BR05 is a 10.5" replacement barrel purpose-built for the AR-15 platform and chambered in 5.56 NATO. Its carbine-length gas system and 1:7 twist rate are matched to deliver reliable cycling and stable projectile flight across the common range of .223/5.56 bullet weights in short-barrel applications.

Cut from 4150 chrome-moly vanadium steel and finished in black nitride, the barrel pairs wear and corrosion resistance with the smooth bore finish nitride is known for. The medium contour keeps weight reasonable for pistol and SBR builds, and the muzzle is threaded 1/2x28 to accept standard 5.56 muzzle devices.

Manufactured in the USA by One Horse LLC, the OH-BR05 drops into any standard AR-15 upper and serves as a clean drop-in replacement for worn or shorter-than-spec factory barrels. Barrel only - upper, gas block, and barrel nut are not included.