Green Mountain 5.56 AR-15 Barrel 10.3" M4 Phosphate

Build a reliable and maneuverable AR-15 platform with the Green Mountain 5.56 AR-15 Barrel in a compact 10.3-inch M4 profile. Designed for tactical applications where quick handling and consistent performance matter most, this barrel delivers precision and durability in a lightweight package that enhances overall firearm responsiveness.Key Features Chrome-lined bore and chamber - Resists wear from high-volume shooting and simplifies cleaning while maintaining accuracy over thousands of rounds. Phosphate exterior finish - Provides superior corrosion resistance and a non-reflective matte surface ideal for tactical environments. M4 profile with carbine-length gas system - Balances weight and strength for improved handling without sacrificing reliability in short-barreled configurations. 1:7 twist rate - Stabilizes a wide range of 5.56 NATO ammunition, including heavier projectiles for enhanced terminal performance. 0.75-inch gas block journal and 1/2x28 muzzle threads - Offers compatibility with standard gas blocks and popular muzzle devices for easy customization.Technical Specifications Barrel Length: 10.3 inches Caliber: 5.56 NATO Twist Rate: 1:7 Finish: Phosphate with chrome-lined bore and chamber Profile: M4 Gas System: Carbine length Gas Block Journal: 0.75 inches Muzzle Thread: 1/2x28 Platform: AR-15 Weight: 22 ozWhy Choose This BarrelThis Green Mountain barrel addresses common pain points for AR-15 builders seeking compact options: excessive weight that slows target acquisition, poor corrosion protection in demanding conditions, and limited bullet stabilization. The combination of military-inspired M4 contouring, proven chrome lining, and precise 1:7 rifling ensures smooth cycling and consistent groupings whether used in home defense setups or range training. Its carbine gas system promotes reliable function even with varied ammunition loads.Upgrade your AR-15 build today with this high-quality, American-made barrel engineered for performance and longevity.