Andro Corp Industries U55616ML 5.56 NATO 16" M-LOK Complete Upper

The Andro Corp Industries U55616ML is a complete AR-15 upper receiver assembly chambered in 5.56 NATO, built around a 16" barrel and ready to drop onto any mil-spec AR-15 lower. The unit ships fully assembled with the handguard, gas system, and flash hider already installed.

The barrel is machined from 4150 chrome moly vanadium (CMV) steel and finished in Melonite (also known as QPQ) for outstanding corrosion and wear resistance. It features a 1:7 twist rate that stabilizes the full range of .223/5.56 bullet weights, and M4 feed ramps are cut into the barrel extension for reliable feeding. The barrel is threaded 1/2x28 for standard 5.56 muzzle devices and ships with an installed A2 flash hider.

A mid-length gas system with a .750" low-profile gas block keeps the action cycling smoothly while reducing felt recoil and bolt carrier stress compared to shorter carbine-length setups. The M-LOK handguard provides a slim, lightweight platform for mounting lights, lasers, foregrips, and other M-LOK compatible accessories, and the entire upper is finished in anodized black for a clean, low-visibility look.