Faxon 308 WIN 20" Big Gunner Barrel

SKU: 10A810R20NGQ

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Faxon 308 WIN 20″ Big Gunner Barrel

11-degree target crown, MPI Inspected

The Faxon 308 WIN 20″ Big Gunner Barrel is machined from 4150 Chrome Moly Vanadium (CMV) steel with a QPQ Nitride corrosion-resistant finish, and M4 feed ramp extension. 100% manufactured in-house from gun-barrel-quality bar-stock, Faxon puts their barrels through a battery of tests and individually checks each barrel for headspace using precision custom hardened gauges. The Faxon 308 WIN 20″ Big Gunner Barrel is configured with a Rifle gas system, 0.75″ journal and features Faxon’s iconic Gunner profile.

Just what is the Big Gunner profile?

The Big Gunner is the big brother to the Gunner profile; a blend of two of the best performing profiles of all time! From extension to journal, the Big Gunner profile features the Government profile’s well-known taper. Innovation then takes over and the Big Gunner transitions to a 0.75″ gas block journal and pencil front end. Removing weight from the front of the barrel ensures maximum versatility and keeps material to the rear to maximize heat resistance and mitigate whip.

Product Information

Barrel Length



Big Gunner

Muzzle Thread


Gas Block Diameter


Gas System


Part Type

Barrel, Upper Receiver Parts

Twist Rate


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