The Echo1 9.5 inch M4 Outer Barrel is made of steel for strength and realism. This barrel is ideal for any CQB rifle or custom AR15 airsoft build. This barrel features grooves for mounting a standard front sight or a flip-down gas block front sight. Alternately, you can build a modern looking airsoft rifle with a modular free float rail system like the MadBull Troy TRX Extreme 9.0. Complete your custom build with a Bravo Low Profile Gas Block and a KX3 Flash Hider.
Model: ECHO M4 OTB CQB