Faxon 300 BLK 7.5″ Gunner Barrel


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Faxon 300 BLK 7.5" Gunner Barrel

Faxon 300 BLK 7.5" Gunner, designed by Faxon's competition shooting staff.

Manufactured 100% in-house from gun-barrel-quality bar-stock, the Faxon 300 BLK 7.5" 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 300 BLK 7.5" Gunner barrel is individually checked for headspace by precision custom hardened gauges.

Just what is the Gunner profile?

The Gunner profile is a blend of two of the best performing profiles of all time, Government, and Pencil.

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 #: 15A38P7NGQ
  • UPC: 816341023208
  • Barrel Material: 4150 Certified Gun Barrel Quality Steel
  • Barrel Type: Button Rifled
  • Barrel Caliber: 300 BLK
  • Barrel Twist: 1:8
  • Barrel Length: 7.5”
  • Barrel Profile:  Gunner
  • Barrel Gas System: Pistol
  • Inside Finish: QPQ Nitride
  • Outside Finish: QPQ Nitride
  • Muzzle Thread: 5/8-24 TPI (Threads Per Inch)
  • Gas Block Diameter: .750"
  • Gas Port Diameter: .104"
  • Gas Block Journal Length: 1.9"
  • Barrel Extension: M4
  • Weight:  .87 lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown

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Weight 26 oz
Dimensions 8.5 × 2 × 2 in
Barrel Finish

QPQ Nitride


300 Blackout




4150 Chrome Moly Vanadium

Part Type

Barrel, Upper Receiver Parts



Muzzle Thread

5/8 x 24

Gas Block Diameter


Twist Rate


Gas System


Barrel Length




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