I'm getting destroyed in multiplayer and I'm trying to decide whether or not I should buy some of the cheap 5000 credit packs just so I can hopefully get some new weapons, or if I should save up for one of the rare packs and hope I get something awesome.

However, I have no sense of what kinds of things to expect in a rare pack. What kinds of rare items exist? Is there a list somewhere that says exactly what types of items you can get in the rare and uncommon packs? I need to know what's possible so I can make a better informed decision.