If you look close at the dozer pic on the back you can clearly see the 50 cal rifle barrel right behind the small steel box. There were three video cameras mounted on the out side, and three video monitors mounted on the inside. There was an air tank that he could use to keep the camera lenses clean. The plating was solid so there was no other way to see where he was going. The steel plating was two layers with concrete in between. There were three mounted rifles.