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FAXON FIREARMS 20" GUNNER, 5.56 NATO, Rifle-Length, 4150 QPQ

Faxon Firearms 20" GUNNER 5.56 NATO 4150 QPQ Barrel

MSRP $199.00
SALE PRICE: $189.95
Savings: $9.05
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Stock Status :(Out of Stock)

Product Code: 15A58R20NGQ


FAXON FIREARMS 20" GUNNER, 5.56 NATO, Rifle-Length, 4150 QPQ

The GUNNER (all caps, as it is that awesome) is the pinnacle of performance, weight, balance, and value. Designed by our competition shooting staff for those who value performance and versatility, the GUNNER profile is a blend of two of the best performing profiles of all time, Gov't and Pencil.

Proving that every once and awhile, the Government can do something right, the GUNNER's profile from the extension to the gas block mimics that delicious taper. From there, common sense takes over and the GUNNER moves to a .625" gas block journal and our famed pencil profile out front. Removing the weight from the front of the barrel ensures maximum versatility and keeps material to the rear to maximize heat resistance and mitigate whip.

All barrels are manufactured under our ISO:9001 and AS:9100 (pending) quality certifications. We inspect each barrel over 15 times before it ever reaches you.


  • Barrel Material: 4150
  • Barrel Type: Button Rifled
  • Barrel Caliber: 5.56 NATO
  • Barrel Twist: 1:8
  • Barrel Length: 20"
  • Barrel Profile: GUNNER Light Hybrid
  • Barrel Gas System: Rifle Length
  • Inside Finish: QPQ Nitride
  • Outside Finish: QPQ Nitride
  • Muzzle Thread: 1/2-28 TPI (Threads Per Inch)
  • Gas Block Diameter: .625"
  • Gas Port Diameter: .093"
  • Barrel Extension: M4
  • Weight: 1.53 lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 2 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Unbelievable value on a balanced, quality barrel. November 13, 2019
Reviewer: JAMES L. from EDGERTON, KS United States  
Bought this to complete a build from an old M16a1 parts kit that needed a rocker length gas system and a .625 front sight base diameter. Couldn't be happier. Had to have the front sight drilled and pinned by a pro, but these barrels are beautiful. Still waiting for some lower parts, so I don't know how they will shoot, but since they are a smidge bigger from the chamber to the front sight, then pencil thin from the fsb to the end of the barrel, they should point well, and carry even better. The nitriding is beautiful. Very pleased!

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  1 of 1 people found the following review helpful:
5 of 5 Perfect March 4, 2019
Reviewer: Anthony Ross from Grafton, OH United States  
I am building a retro style M161A rifle. Other than a 1:8 twist and not the OEM 1:2 twist, indistinguishable from OEM from the outside. I prefer Nitride in the bore as it's a teeny tiny bit more accurate.

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