The Echo1 M4 Commando is part of the new Genesis line that is designed to provide any level player with a performance-driven airsoft gun. The Commando is modeled after the US Standard Issue MK18 that is designed for close-quarters engagement. The metal barrel measures in at 10.3 inches, perfect for all CQB environments and can even be applied for field use. Externally, the gun is constructed entirely out of high-strength ABS polymer and features a metal barrel, buffer tube, and other external parts. The material used is impact resistant, lightweight, and incredibly tough. This gives the operator an assurance that their airsoft gun will hold up to practically anything that is thrown at it in the field. Internally, Echo1 has implemented their pre-upgraded reinforced metal V2 gearbox with a high torque motor, steel M100 spring, polycarbonate piston, and other upgraded parts. The hop-up unit is adjustable and offers the ability to be easily transitioned for longer range combat.