Vehicles contain six kinds of assembly unit: three for maintain operation and three for attacking enemies. Chassis is the outer casing that holds everything together. Each vehicles have their own unique chassis and can't be changed. Engine determines the maximum loadout for the vehicle. C Unit enables vehicles to be handled by a single crew member; without it, the vehicle cannot function. Main gun has grand power, but limited by ammunition along with smaller attack range. Sub gun has large fire range without ammunition, but low attack. Special equipment comes with large and high fire power, but heavy and/or expensive is high.