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The Faxon Gunner Duty 11.5-inch barrel is a smart pick for anyone putting together a short, nimble AR-15 that still plays nicely with a can. Faxon calls this contour the Big Gunner, and it splits the difference between a Government profile and a slimmer Pencil profile. You get a Government taper behind the gas block for structural support, then a straight forward section that runs out to a full shoulder and a standard 1/2×28 threaded muzzle. The whole thing tips the scale at around 1.14 pounds, so the front end stays light and quick to move.
The mid-length gas system is the headline feature here. On an 11.5-inch barrel, that longer gas system stretches out the dwell time and gives you a softer, more manageable recoil impulse than a typical carbine setup. It's a geometry aimed squarely at folks who plan to run a suppressor down the road. Because 11.5 inches makes for a fairly short dwell, Faxon opens up the gas port a bit larger than average to keep the action cycling reliably. Pairing this barrel with an adjustable gas block is a popular move, since it lets you dial in the port for your specific ammo and muzzle device, suppressed or not.
Every one of these barrels is made in-house from certified 4150 CMV steel and button-rifled to a versatile 1:8 twist that stabilizes the full 55 to 77 grain range of common 5.56 loads. Faxon runs them through full stress relief, air-gauge testing, magnetic particle inspection, and individual headspace checks before they leave the shop. The 11-degree target crown helps keep muzzle behavior consistent for better accuracy, and the black nitride finish coats the bore inside and out for solid wear and corrosion resistance. It's a barrel that punches well above its price bracket and earns its reputation as a go-to for compact, suppressed builds.
Yes, this barrel was designed with suppressor use in mind. The mid-length gas system on an 11.5-inch barrel gives you a smoother recoil impulse that pairs nicely with a can. Many builders run it suppressed with an adjustable gas block to fine-tune the timing and cut down on gas blowback.
The 1:8 twist is a great all-around choice that stabilizes the common 55 to 77 grain 5.56 loads. That covers everything from cheap 55gr range ammo up to heavier 77gr match projectiles. It's about as versatile as twist rates get for a 5.56 build.
You don't strictly need one, but it's a smart addition. Because the 11.5-inch length has a short dwell time, Faxon uses a larger gas port to guarantee reliable cycling, which can send extra gas back at you when suppressed. An adjustable gas block lets you tune things down for your specific ammo and muzzle device.
Yes, this is a standard AR-15 barrel that drops into any mil-spec upper receiver. It uses a .625-inch gas block journal and a 1/2×28 threaded muzzle for common brakes and suppressors. You'll just need a compatible mid-length gas tube, gas block, and handguard to complete the build.
| UPC | 816341020016 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 15A58M11NGQ |
| Barrel Length | 11.5'' |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Length | 11.5'' |
| Model | |
| Product Type | Barrel |
| Sights | No |
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