shooting at a corner after they go behind it is a great tactic, if you have enough rounds. it eliminates the issue of reaction time, and they are almost guaranteed to come back out and get killed. i do it all the time, suros is perfect because it has so much ammo, and the bullets only get stronger. And actually the main reason im using it for IB is beacuase its my only decent 300 attack AR, I dont like epilogue ..