[@Hawthorne] Oh, and something else that slipped my mind- military MAS are a relatively new invention, moreso for the UEE anyway. The Coalition has been using mechs since the start of the war, whereas the UEE have began using them more recently. Though since Bob grew up in fringe colonies/FEZ, which is close enough to Coalition space, I suppose the Hephaestus could've originally been a Coalition built civilian model. 

Other note, at this point, since its been retrofitted so heavily, the Hephaestus probably would not be much like its original model at all, so the 'Mass Produced' tag should probably be replaced with a 'Custom' or 'Retrofit' tag