[quote=@WilsonTurner]
Those legs/waist would be crushed to oblivion.

The giant cannon wouldn't be kinetic; ammunition wouldn't be able to be efficiently funneled to it.

General proportions and all that suggest that firing the big cannon would drop it on its back.

Very easy target for a whole lot of effort and resources.

General design of it suggests a medieval-y walker, steampunky. I don't think technology would've advanced sufficiently to have such little legs pull up such big feet and move them without falling over, nor while keeping up such a great big weight.
[/quote]

Tell that to the 40k Imperium of Man. And the two big guns happen to be energy weapons, yes.