try it on editor.
Tested by placing an uh-80 to the taxiway directly west of the control tower and shooting at the control tower. Point of aim in the wall between the 1st and 2nd level windows. I tried it with an autorifleman too. He can burn through all his magazines without effect, but the uh-80 door gunner collapsed the building to first stage with as low as 26 rounds and completely to ground with less than 200.