The OP needs to be a member of some of the other "Z-word" sites out there, that deal with lots of hypothetical, crazy stuff like shooting through walls or your going be eaten by a "Z-word". I never say the "Z-word" any more because its bad luck.
If I had a hypothetical squad of "Z-words" trying to eat me, then I would use my CZ-858 (VZ-58) because it is very light, so pound for pound, it is my favorite gun if I had to carry it all day, and it can shoot through a brick wall also. I have never tried shooting a .223 through a brick wall, but from what I have heard, then still do go through, but have'nt tried it personally. I have tried a 7.62x39 and yes it goes through the cinder block I shot at.
Awesome, I'm going to go play some Call of Duty now too, because my sons gone for the day, and I have access to his X-Box360.