metal trigger, electronic hopper, better bottom line. And if possible a different grips
FAST and Cheap
Cheap, sometimes it recocks faster than the balls can get into the breech.
If you are looking for a cheap marker that will keep up with the rest of the electros then this is it. But I did not like it. I practiced with it daily for at least a month and shot at least 3 or 4 cases of paint through it and it can rock and roll. But it is a glorified Spyder thats all it really is. If you are looking for a electronic marker get a Spyder. And I am not a fan of Spyder's. I sold mine to sir_paint's cousin.