FAXON DUTY SERIES PENCIL PROFILE 16" MID-LENGTH .308 WIN AR10 BARREL
Faxon
$259.00
(5 reviews)
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Faxon
FAXON DUTY SERIES PENCIL PROFILE 16" MID-LENGTH .308 WIN AR10 BARREL
Faxon Duty Series — 16" Pencil Profile .308 Win AR-10 Barrel
4150 CMV Steel • 1:10 Twist • Pencil Profile • Salt Bath Nitride • 5/8x24 Threads • Mid-Length Gas
The Faxon Duty Series 16" Pencil Profile .308 Win Barrel delivers unmatched weight savings without compromising precision or durability. Designed and manufactured 100% in-house at Faxon Firearms in Cincinnati, Ohio, this barrel brings Faxon’s renowned Pencil profile to the AR-10 platform — combining agility and accuracy for shooters who demand the lightest possible rifle.
Each barrel is machined from 4150 CMV steel, fully stress-relieved, air-gauge tested, and treated inside and out with a durable Salt Bath Nitride (QPQ) finish. The Pencil Profile is precisely tapered to remove unnecessary weight while maintaining harmonic stability and heat resistance for duty and competition use alike.
Engineered for LR-308 / DPMS-pattern receivers, this 16” mid-length barrel is ideal for builders seeking a lightweight, suppressor-ready .308 platform with Faxon’s proven accuracy and reliability.
Key Benefits
- Pencil Profile: The lightest .308 AR-10 barrel Faxon has ever made — optimized taper for weight reduction and precision.
- 4150 CMV Steel: Mil-Spec material for exceptional strength and thermal stability.
- 1:10 Twist Rate: Stabilizes a wide range of .308 Winchester bullet weights and loads.
- Salt Bath Nitride Finish: Corrosion-resistant inside and out for long service life.
- Mid-Length Gas System: Balanced recoil and smooth cycling for 16-inch carbines.
- 5/8x24 Muzzle Threads: Compatible with standard .30 cal muzzle devices and suppressors.
- DPMS-Compatible Extension: Fits standard LR-308 pattern uppers and components.
- Individually MPI & Headspaced: Every barrel is magnetic particle inspected and headspaced for safe operation.
Specifications
Important Product Note
Faxon Firearms Pencil profile barrels offer maximum weight reduction while retaining accuracy. Ensure proper torque and alignment when installing to avoid stress on the tapered profile. Faxon recommends professional installation and confirmation of headspace with DPMS-pattern receivers. Improper installation or non-compatible components may cause damage or void warranty.
Frequently Asked Questions
Why choose a Pencil profile barrel?
The Pencil profile is Faxon’s lightest barrel design, reducing weight for faster target transitions while maintaining match-grade accuracy and durability.
Is this barrel compatible with AR-10 uppers?
Yes. It’s compatible with LR-308 / DPMS-pattern uppers and standard .308 Win BCGs and gas systems.
Can this be used with a suppressor?
Yes. The 5/8x24 threads fit most .30-cal suppressors and muzzle devices. Always verify the suppressor’s caliber rating before use.
Overview: 16" Duty Series Pencil Profile .308 Win Barrel
The Faxon Duty Series 16" Pencil Profile .308 Win Barrel is engineered for lightweight AR-10 builds that still demand rugged performance. With a mid-length gas system and a fully nitrided 4150 CMV construction, this barrel delivers outstanding corrosion resistance, heat control, and accuracy in a package weighing under two pounds. Ideal for hunting, competition, or duty applications where every ounce counts.
All Faxon barrels are proudly made in Cincinnati, Ohio, stress-relieved, magnetic particle inspected, and precision headspaced to ensure the reliability and accuracy our customers expect from the Faxon name.
- 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
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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.
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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.
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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.
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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.
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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.