If you will aim with M4 at right angle some of it parts will disappear. I attached screenshot showing this issue.
They are similar problems with small office building (this one: http://hydra-media.cursecdn.com/dayz.gamepedia.com/5/55/School_1a.jpg). If you will look at floor on second or third floor at right angle it will be transparent (so you can see first floor) {F32706}