Faxon 10.5″ 300 BLK Gunner Barrel w/ Pinned Gas Block


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Faxon 10.5" 300 BLK Gunner Barrel w/ Pinned Gas Block

Pinned Gas Block!

Faxon 10.5" 5.56 Gunner Barrel w/ Pinned Gas Block (15A38P10NGQ-APGB) is the barrel of choice if you're looking for a more robust mounting method for your gas block. Pinning your gas block, in addition to the use of set screws, gives the user the extra piece of mind that your gas block won't shift or loosen while firing.  We took some of our most popular barrel models and took the biggest headache out of pinning your gas block by pre-notching the gas block journal and drilling corresponding holes in the included low profile gas block.

Each Faxon 10.5" 300 BLK Gunner Barrel w/ Pinned Gas Block (15A38P10NGQ-APGB) comes with the pin, as well as a gas block. Gas blocks are hand-tightened to the barrel for shipping.

Faxon Firearms barrels are the pinnacle of value. Manufactured 100% in-house from cradle-to-grave, these barrels are fully stress relieved, air-gauge tested, and 11 degree target crowned to ensure superior accuracy.

Quality is imbued into our barrels from the start. We start with the best materials, either certified 4150 Mil-Spec steel or 416-R Stainless. From there, each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. All barrels are individually checked for headspace by precision custom hardened gauges.

Manufacturer Faxon Firearms
Caliber 300 BLK
Length 10.5"
Profile Gunner
Twist 1:8 inches
Muzzle 5/8 x 24
Material 4150 CrMoV
Finish QPQ (Black)
Gas System Pistol; .750 Diameter, Gas Block Included (Pinned)
Weight 1.1lbs

Arm or Ally is a stocking dealer for all Faxon Firearms, Ballistic Advantage, HOLOSUN, Toolcraft, Elftmann Tactical, Timney, CMC Triggers, HIPERFIRE and named the #1 Overall E-Commerce Dealer for Aero Precision Products in 2020!  See our growing inventory of AR Parts, and Reloading Components.

Weight 22 oz
Dimensions 18 × 2 × 2 in
Gas System


Muzzle Thread

5/8 x 24





Twist Rate



300 Blackout

Part Type

Barrel, Upper Receiver Parts

Barrel Length



4150 Chrome Moly Vanadium

Barrel Finish

QPQ Nitride


Gunner, Pinned Gas Block

Gas Block Diameter


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