well, the Z4-DJ is ready to go! its basically the Z3-J but with two jet engines, verses just one on the Z3 (hence the DJ which stands for double jet). the double jet allows it to hover for a while and because it is stabler than its predicessors, it can menuver into hard to reach places. the sword is a bit different on this model, because its been made witha stronger metal. the gun that it is equiped with is a sniper rifel, another change. rate it well, please!