FAXON DUTY SERIES GUNNER PROFILE 18" RIFLE-LENGTH .308 WIN AR10 BARREL
Faxon
$238.00
(5 reviews)
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Faxon
FAXON DUTY SERIES GUNNER PROFILE 18" RIFLE-LENGTH .308 WIN AR10 BARREL
Faxon Duty Series AR10 Barrel — Gunner Profile 18" .308 Win (1:10 Twist, Rifle Gas)
4150 CMV steel • Standard button rifled • Salt bath nitride (QPQ) inside & out • Gunner (Big Gunner) profile • Black oxide extension • 11° target crown (non-recessed) • Rifle-length gas • .750" gas block journal • 1.9" journal length • 5/8x24 TPI • MPI inspected
The Faxon Duty Series Gunner Profile 18" .308 Win AR10 barrel is built for shooters who want a balanced .308 setup with smooth recoil and duty-grade reliability. The rifle-length gas system on an 18-inch barrel delivers a soft impulse and broad tuning flexibility, while the Gunner contour keeps weight and handling in check for practical rifles that still need reach.
Duty Series barrels start with 4150 CMV steel and standard button rifling, then receive QPQ salt bath nitride inside and out for strong corrosion resistance and long service life. The Gunner (Big Gunner) profile uses a sturdier taper behind the gas block for rigidity and a slimmer forward section to reduce front-end weight—an excellent combination for general-purpose builds and suppressor-ready setups.
Proudly American-made by a family-owned manufacturer in Greater Cincinnati, Ohio, each barrel is built for consistent performance and backed by the Faxon standard of quality.
Key Benefits
- Gunner (Big Gunner) balance: Medium taper behind the gas block for stability with reduced forward weight for handling.
- 4150 CMV steel: Duty-grade strength and heat tolerance for real-world use.
- QPQ nitride inside & out: Corrosion and wear resistance for long service life.
- Rifle-length gas: Smooth recoil impulse and consistent cycling on 18" builds.
- 11° target crown (non-recessed): Clean, repeatable shot exit for consistency.
- 5/8x24 muzzle threads: Standard interface for .30-cal muzzle devices and suppressors (verify alignment/mount specs).
- MPI inspected: Quality control focused on dependable performance.
Ideal Use Cases
- General-purpose AR10 builds: A versatile 18" .308 configuration with rifle-gas smoothness.
- Field & hunting rifles: Balanced profile for carry comfort and practical accuracy.
- Training & high-use setups: QPQ protection helps resist corrosion and wear.
- Suppressor-ready builds: 5/8x24 threads support common .30-cal devices (verify suppressor rating and alignment).
Specifications
Build note: Always verify receiver/bolt compatibility, headspace, and muzzle-device alignment prior to use.
Frequently Asked Questions
What is the Gunner (Big Gunner) profile?
It’s a balanced contour with a sturdier taper behind the gas block for rigidity and a slimmer forward section to reduce front-end weight—great for practical rifles and suppressor-ready setups.
How is Duty Series different from Match Series?
Duty Series uses 4150 CMV with standard button rifling and QPQ treatment for rugged, dependable performance and value in real-world conditions. Match Series uses 416-R stainless and 5R rifling for precision-focused builds—different use cases, both made to Faxon standards.
Is this barrel compatible with DPMS / LR-308 pattern receivers?
Yes. This barrel is built for DPMS / LR-308 compatibility. Confirm fitment with your receiver set, bolt, and gas components prior to installation.
Is it suppressor-ready?
Yes. The 5/8x24 muzzle threads fit most .30-cal muzzle devices and suppressors rated for .308 Winchester. Always verify alignment and suppressor caliber rating.
Warranty: Backed by the Faxon Lifetime Guarantee. Full details available at https://faxonfirearms.com/warranty-privacy-terms/
Backed by the Faxon Lifetime Guarantee. Full details: https://faxonfirearms.com/warranty-privacy-terms/
- Barrel Material:
- 4150 CMV
- Barrel Type:
- Button Rifled
- Caliber:
- .308 WIN
- Barrel Length:
- 18"
- Barrel Twist:
- 1:10
- Barrel Profile:
- Big Gunner
- Barrel Gas System:
- Rifle
- 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:
- 2.13 lbs
- Crown Type:
- Recessed 11-degree Target Crown
Reviews
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FAXON DUTY SERIES 18", BIG GUNNER, .308 WIN, RIFLE-LENGTH, 4150 QPQ NITRIDE AR-10 BARREL
These are the only barrels that I will put in my AR 10's for my custom builds. Just wish they were in stock more offten.
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Light and accurate!
lightweight, not picky with ammunition and cycles everything I have without issue. The BA arrel it replaced was extremely picky with ammunition as far as accuracy and cycling. Thank you Faxon!
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Surprising Accuracy
Got this to replace the stock barrel in my Aero M5E1, and for being almost a full two pounds lighter it is still more accurate (at least with my hoard of mixed surplus M80 ball). No issues with undergassing or feeding, headspaced fine using both a Toolcraft and Aero Bolt.
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.308 AR Accuracy Without the Weight Penalty
I was shocked at how accurate this barrel is. During my break in shooting, I put 40 rounds through the barrel offhand and could not miss the same spot. I ended up with an AR10 that weights 10 pounds (with scope) and easily out shoots everything else I own. I bought a second barrel to build a duplicate gun for my brother because it shoots so well. The fit and finish are amazing, the chamber passed when I checked my bolt with a Go, No-go guage set, the shipping was fast. You will not work with a better company when building your AR.
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Light weight tack driver!
I was looking to replace the barrel from another manufacturer that was heavy profiled with mid gas bust was still printing 2 or more inches at 100yds with match ammo on my Ar10 build. Wasn't happy with accuracy or weight so I switched brands and went with this faxon 18in lighter profile barrel and loved it! Ive only taken it out once so far, did some fuction checks, zeroed and printed a couple 5rnd groups but my groups were only 1/2in at 100yds! It also ran 100% and with the rifle length gas the recoil was almost not noticable and made for soft shooting. This barrel increased the accuracy of my rifle and cut almost a pound off the overall weight. I can't be happier this was the perfect barrel for my ar10 build. Highly recommend for precision or hunting rifle build!