M4-EXO3 300 AAC Blackout Assembled Upper Receiver - M4-Exo 300 AAC Blackout 13.9'''' Bbl 13'''' EXO3 Rail W/Nox Brake

Sons of Liberty Gun Works

Overview

The M4-Exo3 300 AAC Blackout Assembled Upper Receiver is a complete assembly featuring a 13.9-inch barrel specifically designed for the 300 Blackout caliber, making it an ideal choice for those looking to optimize their AR-15 for versatility in ammunition use. The M4 receiver type ensures compatibility with a wide range of components while the black finish provides a sleek and tactical appearance. This upper is commonly found in builds that focus on the 300 Blackout caliber, offering enhanced performance for both subsonic and supersonic loads.