FN America 16" Button Broached Barrel - 5.56mm NATO - Carbine-Length Gas - 1:7

FN America 16" Button Broached Barrel - 5.56mm NATO - Carbine-Length Gas - 1:7

Upgrade your rifle build with the combat-proven heritage of the FN America 16" Button Broached 5.56 NATO Barrel. Precision-manufactured to the exacting standards demanded by defense professionals worldwide, this full-length 16-inch barrel provides the optimal balance of maximum projectile velocity, repeatable accuracy, and field maneuverability. Crafted from certified, U.S.-sourced Chrome Moly Vanadium (CMV) steel in strict accordance with Mil-B-11595E specifications, it delivers the ultimate foundation for shooters building a reliable duty weapon, home-defense carbine, or competitive AR-15 platform.

Every barrel is held to relentless quality-control standards, undergoing individual High Pressure Testing (HPT) and Magnetic Particle Inspection (MPI) to ensure a flawless, stress-free micro-structure before leaving the factory. The bore and chamber are lined with high-grade industrial hard chrome to resist extreme heat erosion and corrosive fouling, promoting seamless cartridge extraction and significantly extending service life over tens of thousands of rounds. Paired with a carbine-length gas system, a versatile 1:7 twist rate, and a durable manganese phosphate finish, this barrel is engineered to run hard and run reliably under any conditions.

Features

Mil-Spec CMV Steel Construction:
Manufactured from premium, U.S.-sourced Chrome Moly Vanadium steel per Mil-B-11595E military standards, delivering superior tensile strength and thermal endurance under sustained rates of fire.

Precision Button Broached Rifling:
Engineered using precision button broaching to maintain tight, uniform bore tolerances, ensuring consistent bullet engagement and repeatable downrange accuracy.

Chrome-Lined Chamber & Bore:
Heavy hard-chrome lining guards critical internal contact points against high-heat gas erosion and friction, ensuring smooth chambering, positive extraction, and extended duty life.

Dual Proof Certified (HPT & MPI):
Individually High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to eliminate micro-stresses and structural flaws for absolute field reliability and safety.

Versatile 1:7 Twist Rate:
Optimized rifling stabilizes a broad range of 5.56x45mm NATO projectiles, from common 55-grain range ammunition to heavy 69-grain and 77-grain match-grade defensive loads.

M4 Feed Ramps & Barrel Extension:
Features a factory-installed barrel extension with precision-cut M4 feed ramps to optimize cartridge approach angles and guarantee reliable feeding during rapid cycling.

Matte Manganese Phosphate Finish:
Treated with a rugged mil-spec manganese phosphate exterior coating that provides corrosion resistance, abrasion defense, and a non-reflective matte black tactical appearance.

Specifications