FAXON DUTY SERIES GUNNER PROFILE 18" RIFLE-LENGTH .308 WIN AR10 BARREL
Faxon
$249.00
(5 reviews)
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Faxon
FAXON DUTY SERIES GUNNER PROFILE 18" RIFLE-LENGTH .308 WIN AR10 BARREL
Faxon Duty Series — 18" Big Gunner Profile .308 Win AR-10 Barrel
4150 CMV Steel • 1:10 Twist • Big Gunner Profile • Salt Bath Nitride • 5/8x24 Threads • Rifle-Length Gas
The Faxon Duty Series 18" Big Gunner .308 Win Barrel is built for precision, reliability, and performance on the AR-10 platform. Designed and manufactured 100% in-house in Cincinnati, Ohio, this barrel combines Faxon’s renowned Gunner contour with a rifle-length gas system for smoother recoil and superior accuracy at distance.
Each barrel is machined from 4150 CMV steel, fully stress-relieved, and treated inside and out with Salt Bath Nitride (QPQ) for maximum corrosion resistance and longevity. The Big Gunner profile provides a medium taper behind the gas block for strength while shedding forward weight for improved balance, ideal for use as a suppressor host or competition rifle.
Compatible with LR-308 / DPMS-pattern receivers, this 18” rifle-length barrel delivers premium performance and durability whether used for long-range shooting, duty work, or precision competition.
Key Benefits
- Big Gunner Profile: Medium taper for rigidity and balance, optimized for precision and reduced front weight.
- 4150 CMV Steel: Duty-grade material built for sustained firing and heat management.
- 1:10 Twist Rate: Stabilizes a broad range of .308 Winchester bullet weights.
- Salt Bath Nitride Finish: Corrosion-resistant inside and out for superior longevity.
- Rifle-Length Gas System: Ensures smooth cycling and reduced recoil impulse for full-length AR-10 rifles.
- 5/8x24 Muzzle Threads: Standard threading for .30-cal suppressors and muzzle devices.
- DPMS-Compatible Extension: Fits LR-308 pattern receivers with precision.
- Individually MPI & Headspaced: Every barrel is magnetic particle inspected and PTG headspaced for safety and accuracy.
Specifications
Important Product Note
Faxon Firearms Duty Series barrels are engineered for dependable performance and long service life. Verify proper torque, gas alignment, and headspace when installing on DPMS Gen 1-pattern receivers. Faxon recommends professional installation for optimal accuracy and safety. Improper installation or incompatible parts may cause damage or void warranty.
Frequently Asked Questions
What is the Big Gunner Profile?
Faxon’s Big Gunner profile is a balanced medium-taper design that maintains rigidity behind the gas block and reduces forward weight for quicker handling and better heat management.
Is this barrel compatible with AR-10 uppers?
Yes, it’s compatible with LR-308 / DPMS-pattern upper receivers and standard .308 Win BCGs and rifle-length gas components.
Can I use this barrel with a suppressor?
Yes. The 5/8x24 muzzle threads accommodate most .30-cal suppressors and muzzle devices rated for .308 Winchester.
Overview: 18" Duty Series Big Gunner .308 Win Barrel
The Faxon Duty Series 18" Big Gunner .308 Win Barrel provides rifle-length precision and duty-ready strength in a lightweight contour. Featuring a 1:10 twist, 4150 CMV construction, and salt bath nitride finish, it offers long-range stability, consistent accuracy, and smoother recoil—perfect for precision, competition, or field use.
Every Faxon barrel is made in Cincinnati, Ohio, stress-relieved, MPI inspected, and headspaced to deliver the accuracy, dependability, and American craftsmanship that define the Faxon Firearms brand.
- 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!