FAXON DUTY SERIES PENCIL PROFILE 18" RIFLE-LENGTH .308 WIN AR10 BARREL
Faxon
$239.00
(2 reviews)
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Faxon
FAXON DUTY SERIES PENCIL PROFILE 18" RIFLE-LENGTH .308 WIN AR10 BARREL
Faxon Duty Series AR10 Barrel — Pencil Profile 18" .308 Win (1:10 Twist, Rifle Gas)
4150 CMV steel • Standard button rifled • Salt bath nitride (QPQ) inside & out • Pencil profile • Black oxide extension • 11° target crown (non-recessed) • Rifle-length gas • .750" gas block journal • 1.1" journal length • 5/8x24 TPI
The Faxon Duty Series Pencil Profile 18" .308 Win AR10 barrel is built for shooters who want maximum mobility from a .308 platform without giving up the dependable performance you expect from a hard-use barrel. The Pencil contour is engineered to cut unnecessary weight for faster handling—ideal for field rifles, lightweight precision builds, and practical rifles that still need .308 reach.
Duty Series barrels start with 4150 CMV steel and standard button rifling, then receive salt bath nitride (QPQ) inside and out for corrosion resistance and long service life. Paired with rifle-length gas, this 18" configuration is tuned for a smooth recoil impulse and consistent cycling in balanced AR10 setups.
Made by a family-owned American manufacturer in Greater Cincinnati, Ohio, this barrel is a purpose-built option for real-world rifles—light, capable, and ready for the long haul.
Key Benefits
- Pencil profile handling: Lightweight contour designed for fast transitions and all-day carry.
- 4150 CMV steel: Duty-grade strength and heat tolerance for real-world conditions.
- QPQ nitride inside & out: Excellent corrosion and wear resistance for long service life.
- Rifle-length gas on 18": Smooth recoil impulse and broad tuning range for balanced builds.
- 11° target crown (non-recessed): Clean, repeatable bullet exit to support consistency.
- 5/8x24 threads: Standard interface for .30-cal muzzle devices and suppressors (verify alignment/mount specs).
- Different use case, not a downgrade: Duty Series prioritizes rugged value and reliability for hard use.
Ideal Use Cases
- Lightweight .308 AR10 builds: Pencil contour keeps the rifle quick and carry-friendly.
- Hunting & field rifles: Reduced front-end weight for better balance in real terrain.
- Training-ready setups: QPQ protection supports high-use environments and weather exposure.
- Suppressor hosts: 5/8x24 supports 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
Why choose a Pencil profile .308 barrel?
Pencil profile barrels focus on lightweight handling—reducing front-end mass for faster transitions and easier carry, especially in field or all-day setups.
How is Duty Series different from Match Series?
Duty Series is built around 4150 CMV with standard button rifling for rugged reliability 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 suppressor-ready?
Yes. The barrel uses 5/8x24 muzzle threads—common for .30-cal muzzle devices and suppressors. Always verify suppressor caliber rating and alignment.
Will this fit DPMS / LR-308 pattern receivers?
This barrel is built for DPMS / LR-308 compatibility. Confirm fitment with your receiver set, bolt, and gas components prior to installation.
Warranty: Backed by the Faxon Lifetime Guarantee. Full details available at https://faxonfirearms.com/warranty-privacy-terms/
Backed by the Faxon Lifetime Guarantee for materials and workmanship.
Learn more: 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:
- Pencil
- Barrel Gas System:
- Rifle
- Outside Finish:
- QPQ Nitride
- Muzzle Thread:
- 5/8x24
- Gas Block Diameter:
- .750"
- Gas Block Journal Length:
- 1.1"
- Barrel Extension:
- LR-308 (DPMS Compatible)
- Barrel Weight:
- 1.97 lbs
- Crown Type:
- Recessed 11-degree Target Crown
Reviews
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Barrel Gas Port Location
The barrel appears to be made well. I scoped the inside to see the internal condition. The only issue I found was the gas port hole was cut in the middle of a land. I wonder if this will cause issues with accuracy as the gas hole can cause the spin to momentarily disrupt.
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FAXON 18" Pencil, .308 WIN, Rifle-Length, 4150, Nitride
Absolutely a beautiful barrel. I installed it in an Aero Precion enhanced upper and it resulted in a lightweight upper that balances perfectly. I haven't had a chance to shoot it yet but if it is as accurate as the pencil barrel I installed on my AR-15, it will be a tack driver.