It's way underscaled. Dimensions posted for it online before it shipped were either wrong totally or were for the packaging as opposed to the model itself, but the model is I think either 1/32 scale or so from what I've heard of those who bought and built it.
I had a story on the front page when it first surfaced because I did measurements on the given dimensions online for the model and compared them with the actual dimensions of the vehicle (if it existed of course) and it matched to almost exactly 1/18 scale or, more or less, Star Wars 3.75" figure scale... SW figures "scale" varies because nobody's keeping track at Hasbro.
But yeah, the Corp. Alliance tank is way undersized, believe me I was hoping beyond hope it was what I thought at first. Unfortunately it's nowhere close. It's actually closer to the SW Miniatures Battles game if I'm not mistaken, but maybe a bit large for that.