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

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

Achieve the ultimate balance of soft recoil, thermal endurance, and tack-driving precision with the FN America 16" Button Broached 5.56 NATO Barrel. Purpose-engineered for hard-use carbine and duty rifle builds, this barrel incorporates a mid-length gas system designed to optimize chamber dwell time, lower bolt carrier velocities, and soften felt recoil compared to traditional carbine-length systems. Machined from premium, U.S.-sourced Chrome Moly Vanadium (CMV) steel in strict compliance with military specification Mil-B-11595E, it provides the rugged foundation required for high-volume firing schedules and mission-critical reliability.

Every barrel features precision button broached rifling with a versatile 1:7 twist rate, stabilizing heavy 62-grain, 69-grain, and 77-grain tactical and defensive loads with exceptional consistency. Internally, the chamber and bore are lined with industrial hard chrome to resist aggressive heat erosion and corrosive fouling, promoting effortless extraction and a significantly extended service life. Individually certified through High Pressure Testing (HPT) and Magnetic Particle Inspection (MPI), and finished with M4 feed ramps and an exterior manganese phosphate coating, this 16-inch barrel is built to outperform in any environment.

Features

Optimized Mid-Length Gas System:
Reduces port pressure and bolt carrier velocity for a smoother recoil impulse, faster sight recovery, and reduced internal wear on critical operating components compared to standard carbine-gas profiles.

Mil-Spec CMV Steel Construction:
Forged from certified, U.S.-sourced Chrome Moly Vanadium steel per Mil-B-11595E military standards, delivering superior tensile strength and thermal stability under rapid strings of fire.

Precision Button Broached Rifling:
Engineered to exacting bore and groove tolerances, ensuring uniform bullet engagement, minimal projectile distortion, and repeatable downrange accuracy.

Chrome-Lined Chamber & Bore:
Heavy hard-chrome lining defends internal surfaces against high-temperature gas cutting and environmental corrosion while facilitating smooth chambering, positive extraction, and simple maintenance.

Dual Proof Certified (HPT & MPI):
Every barrel is individually subjected to High Pressure Testing (HPT) followed by Magnetic Particle Inspection (MPI) to detect micro-stresses and ensure structural integrity prior to shipment.

Versatile 1:7 Twist Rate:
Stabilizes a broad selection of 5.56x45mm NATO ammunition profiles, delivering optimal terminal performance with standard 55-grain loads as well as heavy 77-grain match-grade projectiles.

M4 Feed Ramps & Barrel Extension:
Equipped with a factory-installed barrel extension featuring precision-cut M4 feed ramps to optimize the feeding angle and prevent malfunctions during rapid cycling.

Matte Manganese Phosphate Finish:
Mil-spec exterior finish provides rugged abrasion defense, active resistance to oxidation, and a durable, non-reflective black tactical appearance.

Specifications