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

Compact. Chrome-lined. Built to perform.

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.