Faxon Duty Series 7.5" Gov't/Socom, 5.56 NATO, Pistol-Length, 4150 QPQ Nitride AR-15 Barrel

(3 reviews)
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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 NATO
  • Barrel Twist: 1:8
  • Barrel Length: 7.5"
  • Barrel Profile: Gov't/Socom
  • Barrel Gas System: Pistol
  • Inside Finish: Black Nitride
  • Outside Finish: Black Nitride
  • Muzzle Thread: 1/2-28 TPI (Threads Per Inch)
  • Gas Block Diameter: .750"
  • Gas Block Journal Length: 1.9"
  • Barrel Extension: M4
  • Weight: .89 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:
4.5" - 7.5"


  • 5
    7.5 SoCom

    Posted by Thomas Bowen on Mar 3rd 2023

    Yeah buddy! Short and sweet!

  • 5

    Posted by Alex Hampton on Jun 3rd 2020

    It’s an outstanding quality barrel. I have the same pistol and this is the third barrel I’ve had on it. Exact same set up each time, but this one is holding a 1.5” diameter group at 250 yards pretty consistently. Great quality, great company, look forward to more builds using Faxon parts in the future!

  • 5
    Very accurate.

    Posted by Michael Spivey on Apr 16th 2018

    I can hit a man-sized sillhouette at 250 yards every shot with M193 out of this barrel. Anyone who tells you a 7.5 isn't accurate is wrong.