No such thing as the Valk or the QCB. /
But OT, if you can control recoil/like long range maps, then go for the Valkyrie. If not, then get the M417 Combat. CWHATIDIDTHERE?
Lol. I can 3hit people with the CQB. Not in the back either. It's just that while in full auto, all of your shots don't register. just tap/popfire them.