This is a terrain piece...
To be more specific is it Atlas Model Railroad #2835, Square Highrise from their High Rise Series. It seems to be an older kit as the tape on the box and the instructions were slightly yellowed. I found it in a Model Railroad/RC/Rocket/Model hobby shop in downtown Junction City. Didn't even know the place existed until I heard a radio ad on Thursday. I'm going to go back at some later point and get the other two hexagonal towers they had.
Here's a pic showing some Rach infantry supported by a Dictator doing what Rach infantry do, assault tanks and CAVs.
And a close up of the action
All told this took me about 3~3.5 hours to complete, though to be honest I wasnt' paying attention to the time when I started. On other fronts, I've four more Silent Death minis ready for sealing and kept plugging away at painting 6mm bases.
Forgot mention, it's 16 5/8 inches tall to the roof and 22 inches to the top of the antenna.