Sons of Liberty Gun Works M4-EXO3 5.56mm 16" Bbl Mid Gas EXO3 Rail A2FH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-16-A2

The Sons of Liberty Gun Works M4-EXO3 Barreled Upper is a full-length, duty-ready upper receiver group designed for general-purpose applications and long-term reliability. Built on a Mil-Spec 7075-T6 forged upper, it features a 16-inch Liberty Fighting Barrel with a mid-length gas system, which is optimized to provide a smoother recoil impulse and increased longevity of internal components. This assembly is equipped with the EXO3 handguard, a lightweight and streamlined M-LOK mounting platform that utilizes a robust steel barrel nut for a secure, stable interface. Finished in hardcoat anodized black and capped with a standard A2 flash hider, this 16-inch upper is a versatile and rugged solution for any standard AR-15 rifle build.