Considering the game isnt even out yet this thread is pretty useless. We dont know the full list of what weapons will be in the game so how are we going to discuss what weapons we wish would have made it when nothing is even final yet.
Regardless if Brink is released or not, the game isn't using real world weapons - we don't need a full list of weapons to know that. So any real world gun that someone wants in the game, is not going to be in it, hence, the topic being a "wish list."
They may have guns inspired by real world weapons, but that's probably as close as your gonna get.