M4-89 5.56x45 NATO Assembled Upper Receiver - M4-89 5.56x45 NATO 12.5" Bbl 11.5" M89 Rail W/A2 Flash Hider

Sons of Liberty Gun Works

Resumen

The M4-89 assembled upper receiver from Sons of Liberty Gun Works is designed for the AR-15 platform and features a 12.5-inch barrel chambered in 5.56 NATO. This complete upper assembly simplifies the build process, allowing builders to easily attach it to their lower receiver for a compact yet versatile firearm. This upper receiver is commonly used in builds aimed at close-quarters engagements, where maneuverability and rapid handling are essential.