Green Mountain 5.56 AR-15 Barrel 16" M4 Phosphate

Upgrade your AR-15 build with the Green Mountain 5.56 AR-15 Barrel 16" M4 Phosphate, a precision-engineered component designed for reliable performance in tactical and recreational shooting applications. Manufactured to exacting standards, this carbine-length barrel delivers consistent accuracy and durability for 5.56 NATO platforms.Key Features Chrome-lined bore and chamber with phosphate exterior finish for superior corrosion resistance and extended service life M4 profile barrel balances weight and rigidity for improved handling during rapid fire sequences Carbine-length gas system ensures smooth cycling with standard AR-15 components 1:12 twist rate optimized for a range of bullet weights in 5.56 NATO ammunition 0.75" gas block journal and 1/2x28 muzzle threads for versatile accessory mountingTechnical Specifications Barrel Length: 16 inches Platform: AR-15 / M4 compatible Cartridge: 5.56 NATO Finish: Phosphate + Chrome Lined Profile: M4 Gas System: Carbine Gas Block Journal: 0.75 inches Twist Rate: 1:12 Muzzle Thread: 1/2x28 Weight: 30.8 ozWhy Choose This BarrelThis Green Mountain barrel addresses common shooter concerns by providing a chrome-lined interior that resists fouling and wear, allowing for higher round counts without performance degradation. The M4 profile reduces overall weight compared to heavier contours while maintaining structural integrity for sustained use. Its standard carbine gas system and thread pattern simplify integration into existing builds, minimizing the need for custom parts or adjustments.Ideal for builders seeking a dependable, mil-spec style barrel that prioritizes longevity and compatibility over specialized match-grade features.Installation and Compatibility NotesDesigned for standard AR-15 upper receivers with M4 feed ramps. Professional installation is recommended to ensure proper headspacing and alignment. This barrel is compatible with most aftermarket gas blocks, muzzle devices, and handguards featuring carbine-length gas systems.Enhance your firearm's reliability and accuracy-select the Green Mountain 5.56 AR-15 Barrel for your next build or upgrade.