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Faxon AR15 Barrel 5.56 NATO 16" 1:8 Gunner Profile - Black
$172.00MSRP: $186.00Faxon Firearms Duty Series Gunner 16" 5.56 NATO AR-15 Barrel - Mid-Length Gas, Nitride Finish Discover superior performance and exceptional value with the Faxon Firearms Duty Series Gunner Barrel... -
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Aero Precision Low Profile Adjustable Gas Block, Fits AR15 with 0.625" Barrel, Nitride Finish, Black APRH101613C
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Description
Product Overview
Unlock heavy-hitting big-bore performance on your AR-15 platform with the Faxon Firearms 14.5" .338 ARC Gunner Profile AR-15 Barrel. Chambered in the powerful .338 ARC (Advanced Rifle Cartridge), this barrel combines substantial energy transfer downrange with Faxon's hybrid Gunner profile—blending the heat dissipation of a Government contour near the chamber with the lightweight maneuverability of a Pencil profile toward the muzzle.
Precision button-rifled from 416-R stainless steel for match-grade accuracy, this barrel features an all-black Nitride finish inside and out for exceptional wear and corrosion resistance. Configured with a reliable pistol-length gas system, an 11-degree target crown, standard 5/8x24 muzzle threads, and an M4 feed ramp extension, each unit is Magnetic Particle Inspected (MPI) to guarantee duty-grade structural integrity.
NFA / Pin & Weld Compliance Notice: At 14.5 inches in length, this barrel falls below the standard 16-inch federal minimum for non-NFA rifles. To avoid Short-Barreled Rifle (SBR) classification under federal law, it must be installed onto a registered SBR upper, an AR pistol lower receiver, or permanently paired with an extended muzzle device via pin-and-weld to achieve an overall length of 16+ inches.
Key Features
- Big-Bore .338 ARC Chambering: Delivers massive sub-sonic and super-sonic terminal energy on the standard AR-15 chassis.
- Signature Gunner Profile: Combines structural rigidity and heat absorption at the rear with front-end weight savings for ideal rifle balance.
- Match-Grade 416-R Stainless Steel: Precision button-rifled stainless steel construction ensures superior shot-to-shot consistency and tight grouping.
- Full Black Nitride Treatment: Salt Bath Nitride finish provides high surface hardness, friction reduction, and complete corrosion protection.
- Pistol-Length Gas System: Tuned for optimized gas pressure, reliable cycling, and clean feeding with heavy .338 ARC loads and suppressor setups.
- 5/8x24 Muzzle Threads: Standard big-bore thread pitch allows easy attachment of popular muzzle brakes, flash hiders, and suppressors.
- 11-Degree Target Crown: Recessed crown protects critical exit rifling from physical damage to maintain maximum precision.
- MPI Quality Inspected: Individually Magnetic Particle Inspected to ensure freedom from internal stress fractures or flaws.
Specifications
| Brand / Manufacturer | Faxon Firearms |
|---|---|
| Caliber / Chamber | .338 ARC (Advanced Rifle Cartridge) |
| Barrel Length | 14.5 in. |
| Barrel Profile | Gunner Profile |
| Twist Rate & Rifling | 1:8" Button Rifled |
| Material | 416-R Stainless Steel |
| Finish / Color | Black Nitride |
| Gas System Length | Pistol Length |
| Muzzle Thread Pitch | 5/8x24 TPI |
| Gas Block Journal | .750" Diameter | 1.9" Journal Length |
| Barrel Extension & Crown | M4 Extension | 11-Degree Target Crown |
| Quality Testing | Magnetic Particle Inspected (MPI) |
Frequently Asked Questions
What is Faxon's "Gunner" profile and how does it benefit this barrel?
The Gunner profile is a blend of two popular barrel contours: Government and Pencil. It utilizes a heavier Government profile from the extension to the gas block to absorb heat and maintain stiffness, then tapers to a lightweight Pencil profile out to the muzzle. This moves the balance point rearward for faster target transitions without sacrificing accuracy under rapid fire.
Why does this .338 ARC barrel use a pistol-length gas system?
The .338 ARC cartridge utilizes fast-burning powders and heavy projectiles similar to .300 Blackout. A pistol-length gas port maximizes pressure dwell time, ensuring clean, positive cycling with both heavy subsonic and supersonic factory loads, especially when shooting suppressed.
What additional components do I need to complete a .338 ARC rifle build?
In addition to this barrel, building a .338 ARC upper receiver requires a compatible bolt carrier group (typically sharing the same bolt face as 6.5 Grendel / 6mm ARC), a .750" low-profile gas block, a pistol-length gas tube, and .338 ARC pattern magazines.
What are the advantages of 416-R stainless steel with a Nitride finish?
416-R stainless steel is widely recognized for delivering exceptional match-grade accuracy due to its uniform grain structure. Combining 416-R steel with a Black Nitride treatment hardens the surface layer, protecting against weather corrosion, friction wear, and bore erosion while providing a tactical matte black finish.
