The Echo1 14.5 inch M4 Outer Barrel is made of steel for strength and realism. Echo1's M4 carbine barrel is convertible to switch from 14.5 to a shorter 10.5 inch barrel. This outer 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, or go for a SOCOM look with the MadBull SOPMOD RIS-II in FDE. Complete your custom build with a Bravo Low Profile Gas Block and a Rainier Arms Xtreme Compensator.
Model: ECHO M4 OTB