Probably not for things like Heli's. It used to work back in MW3 but they patched it out. So I'd imagine that it wouldn't work in Ghosts either. If I was trying to do this challenge I'd use the LSAT with Marathon. Marathon mainly because the LSAT is such a tank that you can't run more than 10 ft without having to stop with it. However, it is a very accurate LMG that can melt people up close just as easily as it can from across the map. Very low recoil.