Faxon Patented 16" Gunner, 5.56 NATO, Mid-Length, 4150 QPQ Nitride, Integral Flash Hider AR-15 Barrel

(3 reviews)
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Faxon's Integral Rifle Barrels are the perfect choice for any shooter who is looking for the maneuverability of a shorter overall length, but wants the compatibility and versatility that comes with an AR-15 build. With Faxon's Integral Muzzle Device Barrels customers will no longer be locked into a single configuration on their rifle build or be dependent on finding a capable gunsmith to pin & weld their muzzle device to their barrel. Shooters can choose from a 3 port muzzle device or slotted flash hider, allowing the full assembly and disassembly of barrel and barrel nuts. Shooters are forever free to change their weapon's configuration.

Faxon Firearms barrels are the pinnacle of value. Manufactured in-house, these barrels are fully stress relieved, air-gauge tested, and 11 degree target crowned to ensure superior accuracy. 

Quality is imbued into our barrels from the start. We start with the best materials, either certified 4150 Mil-Spec steel or 416-R Stainless. From there, each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. All barrels are individually checked for headspace by precision custom hardened gauges.

  • Barrel Material: 4150 CMV
  • Barrel Type: Button Rifled 
  • Barrel Caliber: 5.56
  • Barrel Twist: 1:8
  • Barrel Length: 14.5" Rifled, 16" Legal Length w/ Integral Slim Flash Hider
  • Barrel Profile:  Gunner
  • Muzzle Device: Integral Slim 3 Port Muzzle Brake
  • Barrel Gas System: Mid
  • Inside Finish: Nitride
  • Outside Finish: Nitride
  • Muzzle Thread: 1/2-28
  • Gas Block Diameter: .625"
  • Gas Block Journal Length: 1.9"
  • Barrel Extension: M4 
  • Weight: 1.35 lbs
  • Magnetic Particle Inspected
  • 11-degree Target Crown

 Note: Cannot be shipped to CA


Barrel Caliber:
5.56 NATO
Barrel Profile:
Barrel Material:
4150 CMV
Rifling Twist Rate:
Muzzle Thread:
Gas Block Diameter:
Gas System Length:
Barrel Length:
Barrel Length Range:
16" - 18"


  • 4
    16" Gunner mid-length w/flash hider

    Posted by Greg on May 7th 2023

    This barrel has very high material and manufacturing quality. The fitment was very snug in my receiver. My gas system fit perfectly and the gun runs great. The weight distribution is very nice and massively improved over the bull barrel that came on the gun. I took off one star because the gun produced massive muzzle flash. It flashes significantly more now than my old muzzle brake flashed HOWEVER I changed a lot of parts all at once so I can't confidently say that the flash is Faxon's fault. The flash is so bright that my eyes hurt after a range session at a well-lit indoor range. I'm using this barrel with Aero Precision standard upper receiver in FDE with a Superlative arms short stroke piston kit and ALG Defense EMR V2 rail and barrel nut. The Superlative Arms gas block "bleeds off" excess pressure so it's possible that this gas system has something to do with the flash but it seemed like the flash was coming from the muzzle. Other than the flash this barrel is very nice and I'm very pleased with every other part. If Faxon responds to this suggestions or if I find some other cause for the flash then I'll update this review.

  • 5
    Integral Barrel

    Posted by David on Jul 23rd 2022

    Haven't got it installed yet but I'm impressed by the design and workmanship. Gives a nice compact package and some weight savings.

  • 4
    16 inch gunner profile ar15 barrel 556 with integral flash hider

    Posted by William Hodgins on Jul 2nd 2020

    Great product , worth the extra money