The Faxon Gunner 16-inch 5.56 barrel (brand part no. 15A58M16NGQ-APGB) is a mid-length 5.56 NATO AR-15 barrel that arrives with its low-profile gas block already pinned, so the hassle of drilling and pinning a gas block is gone. Faxon Firearms pre-notches the gas journal, pre-drills the .625-inch gas block and includes the retaining pin, and the block ships hand tightened for the builder to torque down. The Gunner profile blends the durability of a Government contour with the weight savings of a pencil barrel, and the 4150 chrome moly vanadium steel is salt bath nitrided inside and out. The bore is button rifled with a 1:8 twist and finished with an 11-degree target crown, and every barrel is stress relieved, air gauge tested, magnetic particle inspected and headspace verified. For a builder who wants a permanently attached gas block under a free-float handguard, this barrel does the fitting for you.

Key Specifications

• The chamber is 5.56 NATO, which also accepts .223 Remington.
• Barrel length is 16 inches, the standard carbine length.
• The twist rate is 1:8, a versatile rate for 55- to 77-grain bullets.
• The profile is Gunner, Faxon’s blend of Government durability and pencil-barrel weight savings.
• The gas system is mid-length, for a smoother recoil impulse on a 16-inch barrel.
• The gas block is a .625-inch low-profile block, factory pinned, with the journal pre-notched and the retaining pin included.
• The steel is 4150 chrome moly vanadium, a proven duty barrel steel.
• The finish is salt bath nitride inside and out, for corrosion resistance and bore life.
• The muzzle thread is 1/2×28 with an 11-degree target crown.
• Weight is about 1.37 pounds with the barrel air gauge tested, MPI inspected and headspace verified.

Frequently Asked Questions

Is the gas block really pinned from the factory? Yes. Faxon pre-notches the gas journal and pre-drills the low-profile gas block, includes the retaining pin and ships the block hand tightened for final torque.

What gas block size is it? A .625-inch low-profile gas block, which sits under most free-float handguards.

What does the Gunner profile do? It combines the durability of a Government contour with the weight savings of a pencil profile, balancing the rifle without the whip of a thin barrel.

Buy the Faxon Gunner 16-Inch 5.56 NATO Mid-Length AR-15 Barrel with Pinned Gas Block, Nitride

A pinned gas block used to mean a trip to the gunsmith, and this barrel simply arrives that way with Faxon’s test paperwork behind it. Order it with the rest of our AR-15 barrels from our Lubbock, Texas gun shop for fast, insured shipping.