Faxon AR10 Barrel .308 Win 16" Pencil Profile 1:10 Twist

The Faxon AR10 Barrel in .308 Win with a 16" pencil profile is purpose-built for shooters who demand lightweight performance without sacrificing accuracy or reliability. This is a rifle barrel engineered for AR10 builds where every ounce matters—whether you're running a lightweight precision rifle, a practical hunting setup, or a field gun that needs to move fast. Faxon manufactures these barrels in-house in Cincinnati using 4150 CMV steel, stress-relieved throughout production to ensure dimensional stability and accuracy potential. At 1.78 lbs for the 16" length, the pencil profile delivers genuine weight savings compared to heavier contours, making it an intelligent choice for AR10 shooters who value maneuverability without compromise.

The 1:10 twist rifling is matched to .308 Winchester and will stabilize the full spectrum of common commercial and handload ammunition in that caliber. Faxon chambers all .308 barrels to SAAMI specification, giving you maximum compatibility across factory loads and reloads. The barrel features an 11-degree target crown, which protects the muzzle crown from damage and contributes to consistent accuracy. Threading is 5/8x24, the industry standard for .308 rifles, so you have no shortage of muzzle device options. The LR-308 extension (DPMS-compatible) ensures straightforward installation on your AR10 upper receiver.

Quality control is baked into Faxon's process: each barrel is stress-relieved, air-gauge tested, magnetically particle inspected for internal flaws, and individually headspace-checked with precision custom-hardened gauges before it ships. The finish is salt bath nitride both inside and out, which provides reliable corrosion resistance and a hard, durable surface. Gas block journal diameter is .750" with 1.1" of journal length, compatible with standard mid-length and rifle-length gas systems depending on your build configuration.

Key Features

• 16" pencil profile weighs just 1.78 lbs—lighter than standard contours without sacrificing rigidity or accuracy
• 1:10 twist rifling stabilizes all common .308 Winchester loads
• Stress-relieved 4150 CMV steel for consistent accuracy and durability
• SAAMI-chambered .308 Winchester for maximum ammunition compatibility
• 11-degree target crown protects the muzzle and supports precision shooting
• Salt bath nitride finish (inside and out) for corrosion resistance
• 5/8x24 muzzle threads—standard AR10 threading for easy suppressor or muzzle brake installation
• LR-308 extension (DPMS compatible) for AR10 uppers
• Magnetically particle inspected and individually headspace-checked

Specifications

Caliber	.308 Winchester
Barrel Length	16"
Profile	Pencil
Twist Rate	1:10
Weight	1.78 lbs
Barrel Material	4150 CMV steel
Chamber Spec	.308 Winchester SAAMI
Muzzle Threading	5/8x24
Barrel Extension	LR-308 (DPMS compatible)
Gas Block Journal Diameter	.750"
Gas Block Journal Length	1.1"
Finish	Salt bath nitride (inside and out)
Crown	11-degree target crown
Inspection	Magnetic particle inspected, air-gauge tested, individually headspace-checked

Frequently Asked Questions

Will this barrel work with my AR10 upper receiver?

Yes. This barrel has an LR-308 extension (DPMS compatible), which is the standard for AR10 platforms. The .750" gas block journal with 1.1" of length accommodates both mid-length and rifle-length gas systems depending on your build configuration.

What ammunition does the 1:10 twist stabilize?

The 1:10 twist is matched to .308 Winchester and will stabilize the full range of common commercial and handloaded .308 ammunition. The barrel is SAAMI-chambered in .308 Winchester for maximum compatibility.

How light is this barrel compared to standard AR10 barrels?

The 16" pencil profile weighs 1.78 lbs. Faxon designed the taper to remove weight while maintaining rigidity and accuracy potential, making this one of the lightest options available for the AR10 platform.

Can I use a suppressor or muzzle brake with this barrel?

Yes. The muzzle is threaded 5/8x24, which is the standard threading for .308 rifles and gives you full compatibility with commercially available suppressors, brakes, flash hiders, and other muzzle devices in that thread pattern.