
VADS Emplacement, good against infantry and aircrafts, weak against heavy armor vehicles.(BTW, there is a animation for the ammo belt, too bad it's hard to notice unless ingame)

FAC() Tower, can give hell to a bunch of enemies, but with long fire delay.

and, not a defensive structure, but the supply depot is critical to your warmachine, for supplies stocked here, and collected by your supply trucks.
also check my MODDB page for the rendering video:
http://www.moddb.com...-warfare/videos