Faxon Duty Series 13.9 inch Gunner Profile .308 Win AR10 barrel, mid-length gas, QPQ nitride

FAXON DUTY SERIES GUNNER PROFILE 13.9" MID-LENGTH .308 WIN AR10 BARREL

Faxon
SKU:
10A810M139NGQ
|
UPC:
816341026988
Availability:
Usually ships within 2 business days.
$232.00
(4 reviews)
Current Stock:
Adding to cart… The item has been added
Description

 

Faxon Duty Series AR10 Barrel — Gunner Profile 13.9" .308 Win (1:10 Twist, Mid-Length Gas)

4150 CMV steel • Button rifled • Salt bath nitride (QPQ) inside & out • Gunner profile • 11° target crown • Mid-length gas • .750" gas block journal • 1.9" journal length • 5/8x24 TPI • LR-308 / DPMS compatible

The Faxon Duty Series Gunner Profile 13.9" .308 Win AR10 barrel is designed for compact, hard-use AR10 builds that still want a smooth recoil impulse and practical accuracy. Paired with mid-length gas, this barrel helps balance cycling and controllability in a shorter .308 configuration.

Duty Series barrels start with 4150 CMV steel and button rifling for proven durability and consistent performance. A QPQ salt bath nitride treatment inside and out improves corrosion resistance and wear life for duty, training, and field use.

The Gunner profile is built around balance—retaining strength where it matters while reducing forward weight for faster handling. This length is also a popular choice for pin & weld setups (always confirm overall length with your muzzle device and local requirements). Proudly American-made by a family-owned manufacturer in Greater Cincinnati, Ohio.

Key Benefits

  • Compact 13.9" length: Excellent for maneuverable .308 AR10 builds and pin & weld configurations.
  • Gunner profile balance: Keeps handling quick while maintaining practical rigidity and heat control.
  • 4150 CMV steel: Duty-grade strength and thermal stability.
  • QPQ nitride inside & out: Corrosion and wear resistance for long service life.
  • Mid-length gas: Tuned feel and smoother recoil impulse for short .308 carbines.
  • 5/8x24 muzzle threads: Supports common .30-cal muzzle devices and suppressor mounts (verify alignment/mount specs).
  • .750" gas block journal: Compatible with widely available gas blocks.

Ideal Use Cases

  • Compact AR10 builds: Short overall length with mid-length gas for controllability.
  • Pin & weld projects: Pair with an appropriately sized device to reach legal overall length where applicable.
  • Training & duty use: QPQ nitride helps resist wear and corrosion in harsh environments.
  • Suppressed-ready: 5/8x24 supports common .30-cal mounts (always verify suppressor rating and alignment).

Specifications

Platform / Series
AR10 — Duty Series
Caliber
.308 Win
Length
13.9"
Profile
Gunner (Big Gunner)
Twist Rate
1:10 RH
Material
4150 CMV Steel
Rifling
Button Rifled
Finish
Salt Bath Nitride (QPQ) — inside & out
Gas System
Mid-length
Gas Block Diameter
.750"
Gas Block Journal Length
1.9"
Muzzle Threads
5/8x24 TPI
Extension
LR-308 / DPMS Compatible
Crown
11° Target Crown
Weight
1.80 lbs
SKU
10A810M139NGQ
MSRP
$232.00

Build note: Always verify receiver/bolt compatibility, headspace, and muzzle-device alignment prior to use. For pin & weld builds, confirm legal overall barrel length with your chosen muzzle device.

Frequently Asked Questions

What is the Gunner (Big Gunner) profile?
A balanced contour that keeps strength where it matters while reducing forward weight for faster handling and better heat management—especially useful on compact .308 builds.
Is 13.9" a good choice for pin & weld builds?
Many builders choose 13.9" for pin & weld configurations, but results depend on your muzzle device length and how overall length is measured. Always confirm compliance with applicable laws and regulations.
Will this fit LR-308 / DPMS-pattern receivers?
Yes. This barrel is built for LR-308 / DPMS-pattern components. Confirm bolt and receiver compatibility and verify headspace during installation.
Is it suppressor-ready?
Yes. 5/8x24 threading supports many .30-cal muzzle devices and suppressor mounts. Verify suppressor caliber rating and confirm alignment before firing.

Warranty: Backed by the Faxon Lifetime Guarantee. Full details available at https://faxonfirearms.com/warranty-privacy-terms/

 

 

Warranty
Backed by the Faxon Lifetime Guarantee. See full warranty details here: https://faxonfirearms.com/warranty-privacy-terms/
Additional Information
Barrel Material:
4150 CMV
Barrel Type:
Button Rifled
Caliber:
.308 WIN
Barrel Length:
13.9"
Barrel Twist:
1:10
Barrel Profile:
Big Gunner
Barrel Gas System:
Mid
Inside Finish:
Salt Bath Nitride
Outside Finish:
QPQ Nitride
Muzzle Thread:
5/8x24
Gas Block Diameter:
.750"
Gas Block Journal Length:
1.9"
Barrel Extension:
LR-308 (DPMS Compatible)
Barrel Weight:
1.8 lbs
Crown Type:
Recessed 11-degree Target Crown
Related Products

Reviews

  • 5
    308 WIN, Mid-Length, 4150 QPQ Nitride AR-10 Barrel

    Posted by Steve Clark on Feb 21st 2025

    Bought the Faxon barrel to replace another manufacturer's product (Wilson) which was really was not working properly. As usual, the Faxon barrels always come thru with flying colors. Snug fit and works perfectly. Ty

  • 5
    Based on look and fit

    Posted by Gregory Fetter on Aug 11th 2024

    Bought this to go with my 13.5 hand guard (Stag 10 build) fits perfect with just enough room to lock in a can on the keymod

  • 5
    Quality barrel

    Posted by Kevin Rickborn on Aug 14th 2023

    This is my second Faxon barrel. First one was a 556 20” SOCOM! I liked it so much that I chose to go with this one for my 308 build. Length came out perfect with my Aero Precision handguard. I can’t wait to finish the build so I can send rounds down range. Highly recommend Faxon!

  • 5
    Great as always

    Posted by Dillon J Gulbrandson on Feb 21st 2023

    Have not built it up yet but looks to be the same great fit and finish of others i have recieved from faxon, awesome.