14.5" 5.56 Phosphate Chrome Lined Carbine M-LOK M4 Upper Assembly

14.5" 5.56 Phosphate + Chrome Lined Carbine M-LOK M4 Upper Assembly The 14.5" 5.56 Phosphate + Chrome Lined Carbine M-LOK M4 Upper Assembly is a rugged, no-compromise upper built for reliable performance in demanding conditions. Centered around a top-tier mil-spec forged upper receiver, this assembly features a 14.5" M4-profile barrel with a mag phosphate exterior and chrome-lined bore for maximum corrosion resistance and barrel life. The carbine-length gas system and low-profile steel gas block ensure consistent cycling and durability. The upper is finished with quality American-made M-LOK handguards (style may vary), a nitrided A2 flash hider, and precision assembly practices using Permatex 242 threadlocker and AEROSHELL 33MS anti-seize grease on critical components. Whether you're building a lightweight defensive carbine or a pinned-and-welded compliant rifle, this USA-made upper delivers performance and reliability without cutting corners. BCG and charging handle not included. Specifications Barrel Finish: Mag Phosphate Barrel Profile: M4 Cartridge Compatibility: 5.56 NATO Barrel Length: 14.5" Gas System Length: Carbine Twist Rate: 1:9 BCG / Charging Handle: Not Included Handguard: American-Made M-LOK (style may vary) Muzzle Device: Nitrided A2 Flash Hider Warranty: Limited Lifetime Origin: Made in the USA Engineered for serious shooters, this upper assembly is a solid foundation for any compact AR-15 build.