Should I be using the m4a4 or the m4a1s?

I use the m4a4 because of the extra rounds and I have learned the spray pattern over the years. I am also an aggressiveplayer so it helps with that. If you are more passive and your aim isn't too good yet I'd for surego with the m4a1-s, but once you get better as a player, it's all personal preference.