This. Is. Cairo. The orbital MAC station in charge of defending Earth. One of 300 identical platforms, its gun can fire a 3000 ton slab of radioactive waste at tremendous speed. It will cut a Covenent cruiser in half. That's the real version. Mine's just for show.
About this creation
The gun. The whole point of making the station. The hammer does slide up and down, but I didn't show it.
One of the hanger bays. I know I made these too big. But they work.
The support beam that holds the gun in place. The concept of building the Cairo sounds intimidating, but it's not. Took me 1 hour. Maybe that's why it isn't that good?...
The bridge. This is where you first start out in Halo 2(not counting the armory)
this is clearly the best representation of one of these. it looks like you really studied what these things look like. but to sum all this up in one word....perfect.