It depends on which map you like playing tbh. if your a deathroom/junk flea kinda guy, I prefer the mp5/ scar/ ak47su for low recoil, high damage factor in reasonably close ranges. Also, gotta have the shotgun for backup. The stairs in the upper floor of deathroom is a absolute murder zone with a shotty. The Spas-12 with and extended magazine mod rules, or if you got nx, the m-590 mariner. People will actually leave the room when you start opening up on them and 1-2 shotting them off the stairs.