Faxon 308 WIN 20″ Big Gunner Barrel


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Faxon 308 WIN 20″ Big Gunner Barrel

Faxon 308 WIN 20″ Big Gunner, fully stress relieved, air-gauged, and 11 degree target crowned to ensure superior accuracy.

Manufactured 100% in-house from gun-barrel-quality bar-stock, the Faxon 308 WIN 20″ Big Gunner barrel starts with 4150 Chrome Moly Vanadium Mil-Spec steel. From there, the barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. This beautiful 308 WIN 20″ Big Gunner barrel is individually checked for headspace by precision custom hardened gauges.

Just what is the Big Gunner profile?

The Big Gunner profile is the big brother to Faxon’s popular 5.56 NATO Gunner barrel; a blend of two of the best performing profiles of all time, Government, and Pencil.

Proving every once and awhile, the Government can do something right, the Big Gunner profile from extension to gas block mimics that well-known taper. Innovation then takes over and the Big Gunner moves to our famed 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.

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Product Specifications

  • Manufacturer: Faxon Firearms
  • Part #: 10A810R20NGQ
  • UPC: 816341023308
  • Barrel Material: 4150 Certified Gun Barrel Quality Steel
  • Barrel Type: Button Rifled
  • Caliber: 308 Winchester
  • Twist: 1:10
  • Length: 20”
  • Profile: Big Gunner
  • Gas System: Rifle
  • Inside Finish: QPQ Nitride
  • Outside Finish: QPQ Nitride
  • Muzzle Thread: 5/8-24 TPI (Threads Per Inch)
  • Gas Block Diameter: .750″
  • Barrel Extension: DPMS LR-308 Compatible – Nickel Teflon Coated
  • Weight: 2.24 lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown
  • MSRP: $259.00

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Weight 38 oz
Dimensions 21 × 2 × 2 in
Barrel Length



Big Gunner

Muzzle Thread

5/8 x 24

Gas Block Diameter


Gas System


Part Type

Barrel, Upper Receiver Parts

Twist Rate


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