Actualy Vbraun that looks fine, I think it's just the right size. Don't forget to feature plenty of movement in the animations though, not the legs, but the body of the gun has to move, and perhaps you can work in some recoil on the barel as it fires.
The paramilitary guard is finished and will be posted in the finished units thread as soon as it finishes uploading. I think the size is just right this time, so I may have to redo the Civil guard.
EDIT:
The Mars ROV is posted, For now I've set it up as a worker, with a work animation. It won't be as efficient as the later dedicated rover worker, but I think it suits better the idea of a mars scenario, where each unit is too expensive for it to be doing only one thing, now your rovers can explore, clear roads, set up monitoring stations etc.. I think I'll try to set it up so that the ROV will be used up in these actions.
One other unit I'm thinking of including with this batch is the commando, He'll be quite weak (no armour), but will have HN so he'll be able to raid enemy ROV's and settlers and damage enemy infrastructure. He'll upgrade to the reiver, though I'll probably work on a new model template for the next set of units, don't want them looking too much like variations on a theme (also enables me to include more stuff on one texture sheet and save rendering time);