Considering at the top of the quix it say "Guns you use..." grenades really shouldn't be included in this. And "Red Plasma Rifle" should be accepted for Brute PR. That really is the only difference.
Hey! I liked your quiz, but I also didn't think of grenades. I don't know how you'd have to rephrase the quiz in order to make it easier for people to also believe grenades to be included without giving too much of a hint.