yea i dont see how you guys think its an ied? i forget the site i got it from but it said the ones with silverish outlinings are bullet impacts that were stopped, while the ones without outlines are one that passed through (notice how the silverish holes are where armour is...)
edit : if anything probably what happend was it stopped for some reason and a heavy machine gun just went to hell on the side of it before being blown to hell (thats why the windows on the other side are untouched)