FAXON DUTY SERIES PENCIL PROFILE 16" MID-LENGTH .308 WIN AR10 BARREL
Faxon
$237.00
(5 reviews)
Write a Review
Faxon
FAXON DUTY SERIES PENCIL PROFILE 16" MID-LENGTH .308 WIN AR10 BARREL
Faxon Duty Series AR10 Barrel — Pencil Profile 16" .308 Win (1:10 Twist, Mid-Length Gas)
4150 CMV steel • Standard button rifled • Salt bath nitride (QPQ) inside & out • Pencil profile • Black oxide extension • 11° target crown (non-recessed) • Mid-length gas • .750" gas block journal • 1.1" journal length • 5/8x24 TPI • MPI inspected
The Faxon Duty Series Pencil Profile 16" .308 Win AR10 barrel is built for shooters who want the lightest possible .308 AR without giving up duty-grade durability. With a mid-length gas system and a 16-inch length, this barrel balances fast handling with smooth cycling—ideal for compact AR10 builds where weight and maneuverability matter.
Duty Series barrels begin with 4150 CMV steel and standard button rifling, then receive QPQ salt bath nitride inside and out for corrosion resistance and long service life. The Pencil profile is precisely tapered to remove unnecessary weight while maintaining practical rigidity for real-world use.
Proudly American-made by a family-owned manufacturer in Greater Cincinnati, Ohio, this barrel is backed by Faxon quality and built to run hard.
Key Benefits
- Ultra-light Pencil contour: Built for maximum weight savings and fast handling.
- 4150 CMV steel: Duty-grade strength and thermal stability.
- QPQ nitride inside & out: Corrosion and wear resistance for long service life.
- Mid-length gas: Smooth cycling and balanced recoil on 16" AR10 builds.
- 11° target crown (non-recessed): Clean shot exit for consistent performance.
- 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
- Lightweight .308 AR10 builds: Keep total rifle weight down without sacrificing durability.
- Hunting & field rifles: Easier carry with quick handling in tight terrain.
- Range & training carbines: QPQ protection helps resist corrosion and wear.
- Suppressor-ready setups: 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
Why choose a Pencil profile .308 AR10 barrel?
The Pencil contour is designed for maximum weight savings and fast handling. It’s ideal when you want a lighter rifle for carry, movement, and all-day use.
What does mid-length gas do on a 16" .308 build?
Mid-length gas helps balance reliability and recoil impulse on 16-inch barrels, often providing smoother cycling compared to shorter gas systems while keeping the rifle compact.
Is this 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:
- 16"
- Barrel Twist:
- 1:10
- Barrel Profile:
- Pencil
- Barrel Gas System:
- Mid
- 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:
- 1.78 lbs
- Crown Type:
- Recessed 11-degree Target Crown
Reviews
-
Ultra light.308 build
I used this Faxon light weight .308 pencil barrel for my ultra light weight build. I used the lightest large frame AR parts money can buy and enhanced some for weight savings to get a final weight of 3.98lbs. That’s with a 16” barrel,15” handguard and an actual adjustable butt stock and not that ugly smokes rifle stock or some goofy 10” handguard. Obviously it has an adjustable gas system so the light weight titanium bcg isn’t slamming the buffer tube. It recoils like a .300blk shooting supers. It shoots just under moa groups at 100 yards with federal power shok 150g. I have 5 Faxon barrels and they All perform excellent.
-
Light, and accurate
Built an AR10 type rifle trying to leep everything very light. It came out so light, I figured it would kick hard. It shoots like a dream. Everyone who shoots it wants me to build them one.
-
16” 308 Pencil profile
I bought this for a lightweight hunter build. The weight was perfect for the build and the accuracy was excellent. I have three friends who are doing the same build based on mine.
-
Pencil Barrel
I'm building 3 80% AR 10's A 24" heavy an 20 " medium and a 16" light. WOW this thing is light. Actually lighter than my 223 light. Superior quality. Thanks Faxon.
-
16" 308 Pencil barrel
I used this 28.34 ounce barrel to build the worlds lihjtest AR308 @ 4.46 pounds. The rifle is producing sib MOA groups at 100 yards with 130 SOST Mk 318 ammo as well as 175 SMKs.