The big hype their making is stupid, none of those are exciting new features or anything, they're just trying to lure in uneducated buyers.
A version 3 gearbox isn't really alot better than a version 2 gearbox, almost ALL gearboxes are metal. Only stuffty LPEGs have plastic gearboxes. The page states that it has a Version 2 gearbox, I don't think you'll notice any difference between the two (V2 and V3) though. Nothing really stands out about the rifle but, it is a pretty good value. Honestly though, I wouldn't buy from Evike at all, they're really loving shady. The way they advertise things pisses me off too. If you want, go ahead and get it. You'll still need a battery though.