Faxon Duty Series 16" Gunner, 5.56 NATO, Mid-Length, 4150 QPQ Nitride AR-15 Barrel

(24 reviews)
Current Stock:

The Gunner profile is a blend of two of the best performing profiles of all time, Gov't and Pencil. Faxon's Gunner profile combines the durability of the Gov't profile with the weight savings and maneuverability of the Pencil profile. The Gunner profile brings the balance of the rifle back towards the shooter's body, limiting fatigue, and allowing for shooting, training, or hunting all day long.

Faxon Firearms barrels are the pinnacle of value. Manufactured in-house in Cincinnati, Ohio, Faxon 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 beginning of the manufacturing process.. 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 with precision PTG gauges.

  • Barrel Material: 4150 CMV
  • Barrel Type: Button Rifled 
  • Barrel Caliber: 5.56
  • Barrel Twist: 1:8
  • Barrel Length: 16”
  • Barrel Profile:  Gunner
  • 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:  1.37  lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown
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

    Posted by michael smith on May 11th 2017

    This is a nice barrel. Fit and Finish is very good. Will post after shooting it.

  • 5
    Good fit and finish

    Posted by Kevin on May 2nd 2017

    Barrel looks great. Amazingly lightweight, almost scary after using heavy 18". Overall impressed with it.

  • 5
    Great balance, great finish, very accurate

    Posted by Jon Co on Apr 29th 2017

    The profile has a great balance. the machining looks great, perfect fit in my Spikes upper, accuracy is outstanding

  • 5
    I'm starting to repeat myslef

    Posted by Shwell on Jan 23rd 2017

    This Barrel is performed as good or better than I expected. I have quite a few barrels from Faxon firearms and I have come to trust in their accuracy, the craftsmanship, reliability, as well as their customer service. Feed ramps and extension are very clean and nicely done. Fit to my various upper receivers have been very consistent and borderline tight (this is a great thing). Great profile offers weight savings without jeopardizing function and longevity. With the right ammunition combination I am experiencing sub MOA groups. Highly recommend this barrel and many others offered by Faxon Firearms.

  • 5
    16" Gunner Barrel is Perfect

    Posted by John in Tampa on Oct 17th 2016

    I have used the 16: Faxon Gunner barrel in a few applications and find superb accuracy, combined with great fit, finish, contour look and attractive over all weight package for the complete rifle. Great barrel and reasonably priced... I recommend this barrel for your next 16" AR platform build!

  • 5
    16" GUNNER, 5.56 NATO, MID-LENGTH, 4150 QPQ

    Posted by Unknown on Sep 5th 2016

    Really like this barrel it and the bold assembly I bought with it worked great. I would recommend then to anyone.

  • 5
    Buy this barrel if you want the best!

    Posted by LaJoy Precision Inc. Custom Guns on Aug 23rd 2016

    After having one of my customers ask me to build them a lightweight AR I started to research what would be the best barrel I could find that would fit his requirements. After some time we settled on Faxon’s 16” Gunner barrel. This is one of the best barrels out there. The Gunner barrel is top shelf, very accurate, the contour and weight is perfect and you can’t beat the price. We have use this barrel in over 20 builds and will never look back.

  • 5
    Love this contour

    Posted by Unknown on May 18th 2016

    Really love this contour on a barrel. The finish was very high quality. Shot great !!

  • 5
    Everything i expected and more.

    Posted by Jawmarq on Mar 31st 2016

    The 16" Gunner is impossible to beat for the price IMO. Fit and finish is superb. First 5 shots using some 55gr sp ultra max was about 2moa, 2nd 5 shots fiocchi 50gr vmax was at 1moa. The coyotes don't stand a chance now. Thanks Faxon!