I normally make sure all options are covered, in most cases, maybe not Ghost Recon, but I always make sure a marksman is covering the entr from outside the building, not necessarily for shooting purposes, but for intel too, if there's a target behind the door that the CQB team can't see but I can, as the marksman, I can relay that information to them, the people in the building would only be concerned with the immediate and direct threat to them, meaning that a CQB team can go in, and I can use well aimed, well timed fire to take down visible targets. generally though, I myself tend to avoid CQB situations, if I've got no choice, I stack up, stop, look, listen: check my front check my side, check my rear, then listen, try to derive the approximate position of the assailant, then I attack. in a team situation, I make sure the one with the highest probability of surviving a shot is the first to enter a room. We stack up on them, then move swiftly to clear a room. Like blame, I take preference to silenced weapons, especially in larger buildings with more than one point of contact. At close range a suppressed 9mm is still pretty deadly.