Faxon .308 WIN 18" Pencil Barrel

Faxon .308 WIN 18″ Pencil Barrel

5R rifling, 11-degree target crown, MPI inspected.

The Faxon .308 WIN 18″ Pencil Barrel offers a lightweight, high-performance solution for AR-10 builders seeking superior accuracy without the burden of excess weight. Manufactured from 4150 Chrome Moly Vanadium (CMV) steel and finished with a QPQ salt bath nitride treatment, this barrel delivers exceptional durability, corrosion resistance, and consistent long-term performance in any shooting environment.

This barrel is fully machined in-house from gun-barrel-quality bar-stock and undergoes rigorous quality control processes. Each barrel is Magnetic Particle Inspected (MPI) to verify the integrity of the steel and is individually headspace checked using precision custom hardened gauges to ensure safe and reliable chamber fitment.

The 18″ length and rifle-length gas system make this barrel ideal for precision, long-range shooting, or lightweight hunting applications. The 0.75″ gas block journal ensures compatibility with a wide range of gas blocks, while the Nickel Teflon-coated M4 feed ramp extension promotes reliable feeding under various conditions.

What Makes Faxon’s Pencil Profile Stand Out?
Faxon’s Pencil profile is engineered for shooters who want to reduce front-end weight without sacrificing accuracy or reliability. The carefully tapered design maintains structural strength in critical areas while shedding excess material where it’s not needed. This results in the lightest .308 WIN barrel available—trusted by major industry names like Robar, Kaiser US, and 2A Armament for delivering top-tier performance in a minimalist package.

Key Features:

• Caliber: .308 Winchester
• Barrel Length: 18″
• Material: 4150 Chrome Moly Vanadium (CMV) Steel
• Rifling: 5R – increases velocity, enhances accuracy, reduces fouling
• Finish: QPQ Salt Bath Nitride (inside and out)
• Crown: 11-degree target crown for consistent muzzle performance
• Feed Ramp Extension: Nickel Teflon-coated M4 extension
• Gas System: Rifle-length
• Gas Block Diameter: 0.75″
• Profile: Pencil – ultra-lightweight, performance-focused taper
• Headspace: Individually checked with precision hardened gauges
• MPI Inspected: Ensures material integrity and quality

If you’re looking to build a lightweight .308 platform that doesn’t compromise on reliability or precision, the Faxon .308 WIN 18″ Pencil Barrel is an outstanding choice. If you have any questions, we are always here to help!