If you're making a vault dweller costume (and, I assume, we're thinking of the same source material), how are you going to do the bodysuit? It *is* a bodysuit, after all. The rest seems pretty easy, including sourcing a fitting weapon (assuming you're going that far).

(Oh, and hiya! I've been following your journal for a while now, and I'm in your new comm... somewhere. :p Your journal's helped make me feel less alone and more willing to assert a butch identity - thank you!)