The UM Question

After seeing yet another repaint of Optimus into Magnus (titanium this time) I started thinking abot UM and his "armor". If Magnus is a "white prime" essentially underneath his armor, how come his helmet has a mouth and his prime form has face plate? And how does his mouth work since his face plate just moves up and down?


Since my knowledge of is primarily centered around the toon, I want to hear some peoples opinions about it since this is mostly a comic invention.


Since my knowledge of is primarily centered around the toon, I want to hear some peoples opinions about it since this is mostly a comic invention.