Looking at SMGs, the best VEL 46 loadout is tricky to figure out, as it’ll depend on your tastes and intended use. Players favour assault rifles and SMGs overall as the best guns in MW4, and they’re not wrong to do so. In close-quarter and mid-range engagements in particular there's a clear advantage to using fast firing Vel 46, so I've cooked three builds that adapt to different styles - a run and gun option as well as something for mid range and long range, as much as you can push an SMG a