Faxon Firearms144600043
Faxon Firearms Gunner Duty Series 5.56 Nato 11.5" Black Nitride 4150 Cmv$151.80
Availability: In Stock
The Faxon Firearms Gunner Duty Series 5.56 NATO 12.5" barrel is a short-barrel rifle component engineered for shooters who demand both reliability and shootability in a compact platform. Built on Faxon's proprietary Gunner profile—a hybrid design that merges the proven durability of a government profile with the weight and handling benefits of a pencil profile—this barrel delivers the kind of balance you need whether you're training, hunting, or running drills at the range. The 12.5" length makes it ideal for AR-15 builds where maneuverability and control matter, and Faxon's refined profile design shifts the rifle's balance point closer to your body, reducing shooter fatigue over long sessions.
This is a Faxon barrel through and through, which means it's manufactured in-house in Cincinnati, Ohio, with the kind of process discipline that separates quality barrels from commodity parts. The barrel is fully stress relieved and air-gauge tested during manufacturing, then finished inside and out with salt bath nitride for corrosion resistance and durability. The 11-degree target crown ensures consistent accuracy regardless of how you mount a suppressor or muzzle device. Every barrel is individually headspace-checked with precision PTG gauges—a step many manufacturers skip.
The Gunner profile itself is worth understanding: it's not a government profile, and it's not a pencil barrel. Instead, Faxon engineered a sweet spot that gives you the strength you need for hard use without the weight penalty of a heavier contour. Paired with the 1:8 twist rate and button rifling, this 5.56 NATO barrel stabilizes modern ammunition reliably and prints accurate groups. The 1/2x28 muzzle threading is standard for 5.56 hosts, so suppressor or flash hider selection is straightforward.
If you're building or upgrading a short-barreled rifle and want a barrel that balances shootability, durability, and value, the Faxon Gunner Duty Series delivers on all three fronts.
| Barrel Length | 12.5" |
| Caliber | 5.56 NATO |
| Barrel Material | 4150 CMV Steel |
| Barrel Profile | Gunner |
| Twist Rate | 1:8" |
| Rifling Type | Button Rifled |
| Muzzle Thread | 1/2x28 |
| Barrel Extension | M4 |
| Crown | 11-Degree Target Crown |
| Finish | Salt Bath Nitride (inside and outside) |
The Gunner profile is Faxon's hybrid design that combines the durability of a government profile with the weight savings and handling advantage of a pencil profile. The result is a barrel that reduces overall rifle weight and brings the balance point closer to the shooter's body, decreasing fatigue during long shooting sessions, while maintaining the strength you need for reliable, hard use.
With a 1:8 twist rate, this 5.56 NATO barrel reliably stabilizes modern 5.56 ammunition. The 1:8 twist is the current military standard and handles a wide range of bullet weights commonly used in training, hunting, and duty applications.
Yes. The barrel features 1/2x28 muzzle threading, the standard for 5.56 NATO platforms. The 11-degree target crown ensures clean, accurate mounting for suppressors, flash hiders, or other muzzle devices.
Each Faxon barrel is checked with precision PTG gauges to ensure correct headspace—the critical dimension that affects both safety and accuracy. This individual verification step is a sign of manufacturing quality and helps ensure the barrel will function reliably in your build.
SKU: 144600065 • Width: 3in • Height: 1.2in • Depth: 18.6in • Weight: 1.255oz
Availability: In Stock
The Faxon Firearms Gunner Duty Series 5.56 NATO 12.5" barrel is a short-barrel rifle component engineered for shooters who demand both reliability and shootability in a compact platform. Built on Faxon's proprietary Gunner profile—a hybrid design that merges the proven durability of a government profile with the weight and handling benefits of a pencil profile—this barrel delivers the kind of balance you need whether you're training, hunting, or running drills at the range. The 12.5" length makes it ideal for AR-15 builds where maneuverability and control matter, and Faxon's refined profile design shifts the rifle's balance point closer to your body, reducing shooter fatigue over long sessions.
This is a Faxon barrel through and through, which means it's manufactured in-house in Cincinnati, Ohio, with the kind of process discipline that separates quality barrels from commodity parts. The barrel is fully stress relieved and air-gauge tested during manufacturing, then finished inside and out with salt bath nitride for corrosion resistance and durability. The 11-degree target crown ensures consistent accuracy regardless of how you mount a suppressor or muzzle device. Every barrel is individually headspace-checked with precision PTG gauges—a step many manufacturers skip.
The Gunner profile itself is worth understanding: it's not a government profile, and it's not a pencil barrel. Instead, Faxon engineered a sweet spot that gives you the strength you need for hard use without the weight penalty of a heavier contour. Paired with the 1:8 twist rate and button rifling, this 5.56 NATO barrel stabilizes modern ammunition reliably and prints accurate groups. The 1/2x28 muzzle threading is standard for 5.56 hosts, so suppressor or flash hider selection is straightforward.
If you're building or upgrading a short-barreled rifle and want a barrel that balances shootability, durability, and value, the Faxon Gunner Duty Series delivers on all three fronts.
| Barrel Length | 12.5" |
| Caliber | 5.56 NATO |
| Barrel Material | 4150 CMV Steel |
| Barrel Profile | Gunner |
| Twist Rate | 1:8" |
| Rifling Type | Button Rifled |
| Muzzle Thread | 1/2x28 |
| Barrel Extension | M4 |
| Crown | 11-Degree Target Crown |
| Finish | Salt Bath Nitride (inside and outside) |
The Gunner profile is Faxon's hybrid design that combines the durability of a government profile with the weight savings and handling advantage of a pencil profile. The result is a barrel that reduces overall rifle weight and brings the balance point closer to the shooter's body, decreasing fatigue during long shooting sessions, while maintaining the strength you need for reliable, hard use.
With a 1:8 twist rate, this 5.56 NATO barrel reliably stabilizes modern 5.56 ammunition. The 1:8 twist is the current military standard and handles a wide range of bullet weights commonly used in training, hunting, and duty applications.
Yes. The barrel features 1/2x28 muzzle threading, the standard for 5.56 NATO platforms. The 11-degree target crown ensures clean, accurate mounting for suppressors, flash hiders, or other muzzle devices.
Each Faxon barrel is checked with precision PTG gauges to ensure correct headspace—the critical dimension that affects both safety and accuracy. This individual verification step is a sign of manufacturing quality and helps ensure the barrel will function reliably in your build.
SKU: 144600065 • Width: 3in • Height: 1.2in • Depth: 18.6in • Weight: 1.255oz