More information on the new Echo1 USA Genesis M4 Series provided by Brian Holt. For the price the airsoft guns plus the extras are surely one of the most affordable in the market... "Using a 8mm Version 2 Super Reinforced Gearbox at US$130, it is the best on the market. It comes with 9.6v battery, charger, and the mk1 flash hider to use our mock suppressor."