FAXON DUTY SERIES GUNNER PROFILE 10.5" PISTOL-LENGTH 300 BLK AR15 BARREL
Faxon
$164.00
Not sure if this is the right 300 Blackout barrel?
We built a complete guide covering barrel length, twist rate (1:5 vs 1:8), suppressed performance, and series differences.
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Faxon
FAXON DUTY SERIES GUNNER PROFILE 10.5" PISTOL-LENGTH 300 BLK AR15 BARREL
Description
Faxon Duty Series — 10.5" Gunner 300 BLK AR-15 Barrel (Pistol-Length Gas)
4150 CMV • Button Rifled • Gunner Lightweight Profile • Nitride Inside & Out • MPI & Headspace Checked
The Faxon Duty Series 10.5" Gunner 300 BLK barrel combines exceptional balance and durability for short, versatile builds. Our Gunner profile merges the robustness of a Gov’t contour with the lightweight maneuverability of a Pencil profile—ideal for CQB, suppressed, or compact rifle setups.
Machined from 4150 CMV steel and button rifled with a 1:8 twist, each barrel is fully stress relieved and treated with salt bath nitride inside and out for superior corrosion resistance and long service life. Every Faxon barrel is air-gauge tested, MPI inspected, and headspace checked for reliability and accuracy straight out of the box.
Key Benefits
- Gunner Profile: Combines Gov’t strength with Pencil weight savings for excellent balance.
- Pistol-Length Gas: Optimized for 300 BLK reliability with subsonic and supersonic loads.
- 4150 CMV Construction: Mil-spec steel for rugged performance and heat resistance.
- Nitride Finish: Salt bath nitride inside & out enhances longevity and corrosion protection.
- Quality Control: Stress relieved, air-gauge tested, MPI, and headspace verified.
Specifications
Frequently Asked Questions
Will this barrel run both subsonic and supersonic ammo?
Yes — the pistol-length gas system supports most 300 BLK loads; an adjustable gas block and/or suppressor can optimize cycling.
What muzzle devices can I use?
Any standard 5/8x24 threaded .30-cal muzzle device—brakes, flash hiders, and compatible suppressor mounts.
What’s the benefit of the Gunner profile?
Stiff behind the gas block with weight savings up front for better balance, heat control, and fast handling.
Overview: 10.5" Duty Series Gunner 300 Blackout Barrel
The Faxon Duty Series 10.5" Gunner 300 BLK is a durable, accurate foundation for compact AR-15 builds. Its Gunner profile preserves strength where it counts and trims forward weight for excellent balance. Constructed from 4150 CMV with a 1:8 twist and nitride inside & out, it’s built for high round counts and easy maintenance.
Each barrel is stress relieved, air-gauge tested, magnetic particle inspected, and individually headspace checked. The .750" gas block journal, pistol-length gas, and 5/8x24 threads integrate seamlessly with modern .30-cal devices and suppressor systems—making it a top choice for do-it-all 300 BLK builds.
Warranty
Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, non-standard ammunition, or modifications. Register your product at faxonfirearms.com/product-registration to expedite service. For purchases through dealers or distributors, warranty repairs are handled directly by Faxon Firearms; refunds must be processed through the selling entity. Full policy: faxonfirearms.com/warranty-privacy-terms/Customers Also Shopped These Items
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Reviews
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10.5" 300 Blk-out
Great quality product, fit prefect in my left-handed stag upper, no blemishes Can not wait to take it to the range
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10 1/2 gunner barrel
Nice barrel just like all Faxon products saving money for Faxon bcg
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10.5” Gunner, 300BLK Barrel
Fit and finish is excellant. Chamber size was spot on. Accuracy is better than expected. Pistol length gas works well with super and sub-sonic. Adjustable gas block not needed.
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10.5" Gunner/300 BLK
Fantastic barrel. Lightweight and accurate. The gas port size is perfect for any combination of sub/supersonic loads, suppressed/unsuppressed.
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Light and a tack driver
Replaced my 10.5 300BLK with the light weight gunner. Balance is much better with this barrel and it is super accurate. I put multiple shots it the same hole. Very happy with this purchase.