my concept is a pyramid shape with the top hat being able to raise so that measuring equipment can have a scan of the horizon, if something is a target then a l

my concept is a pyramid shape with the top hat being able to raise so that measuring equipment can have a scan of the horizon, if something is a target then a large cannon comes out of the top too. and if someone tries to blow it up then it's covered by meters of concrete to absorb all damage. and if enemies come to attack it then HQ is notified. it can also send drones to inspect papers and personnel.