Faxon 9" .300 Blackout Gunner Barrel

The Faxon 9" .300 Blackout Gunner barrel hits the sweet spot for .300 AAC Blackout performance. At 9 inches, this barrel length achieves virtually complete powder burn with .300 Blackout cartridges, meaning you extract maximum velocity without wasting propellant as unburned flash and concussion beyond the muzzle. This makes it the optimal length for suppressed shooting — the suppressor handles less unburned gas, runs cooler, and delivers noticeably better sound reduction compared to shorter barrels.

Faxon's proprietary Gunner profile splits the difference between a pencil barrel and a government profile, shaving weight where it matters while retaining enough material at the gas block journal and muzzle for consistent harmonics under sustained fire. The result is a barrel that weighs approximately 1.2 pounds — noticeably lighter than a government profile without the whip and point-of-impact shift issues that plague ultra-thin pencil barrels during rapid strings.

Constructed from 4150 Chrome Moly Vanadium steel with a QPQ salt bath nitride finish, this barrel delivers excellent corrosion resistance and bore durability at a price point that makes quality .300 Blackout builds accessible. The 1:7 twist rate stabilizes the full spectrum of .300BLK projectiles from 110gr supers to 220gr subs, and the pistol-length gas system is properly sized for reliable cycling with both load types.