Ugh; probably too late to mention this, but I will anyways:
QSR has no Rigging rules.
It may seem like a minor matter, but I bring this up because as is, if you go just by QSR rules, and you can't have Hardpoint do Rigging things. And that as it sits, in the QSR he's just going to be a dwarf with an SMG and not much else. In which Sledge is better at doing that then he is.