Turbolaser Tower is a heavy Anti-Vehicle Turret appearing in the Empire at War and its expansion Forces of Corruption. While it might be pre-made, usually you will have to rebuilt it from ruins for 1400 credits. Also, this turret requires so much power that it cannot operate indepedently without a Power Generator. As such, it can sometimes be easier to send a hero or Snowspeeders to destroy the Generator then individually getting rid of every turret in the way, especially since the Mining Facilities and Shield Generators are also dependent on it.