Sons of Liberty Gun Works M4-EXO3 5.56mm 11.5" Bbl Car Gas EXO3 Rail A2FH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-115-A2

The Sons of Liberty Gun Works M4-EXO3 Barreled Upper is a duty-ready, short-barreled upper receiver group designed for high-performance handling in compact configurations. Built on a Mil-Spec 7075-T6 forged upper, it features an 11.5-inch Liberty Fighting Barrel with a carbine-length gas system, which is widely considered the optimal setup for reliability and dwell time in short 5.56 NATO platforms. The EXO3 handguard provides a slim, lightweight M-LOK mounting solution that reduces overall weight while maintaining the durability required for professional use. This assembly comes ready for suppressed or unsuppressed duty, capped with a standard A2 flash hider.