This is a fully manned variant of the Kuat Drive Yards' remote Heavy Ball Turret chassis, using a primitive but redundant azimuth and elevation drive system. It mounts a single (Super) Heavy Turbolaser with a maximum rated output of 720 teratons, or 3e24 joules. This rates it at the destructive output of roughly 15 million Tsar Bombas in one shot. That makes for the capability to destroy things within a 5.5e13km^3 area within say, the Earth's atmosphere. Scary!

The Turret is a cheaper and more failsafe and easy to maintain prototype version of the normal Ball Turret chassis which uses repulsorlift as a traverse and elevation mechanism and an electric arc coupler to power the weapon. See this diagram for depiction of normal mechanism, on the V-150 model of turret http://i.gyazo.com/38a0a5fd96981c2c2db03fbaabe5dc21.png . This turret shares many traits with the V-xxx series of guns from KDY.

The turret houses a multitude of systems, including its own sensor suite, coolant and accelerant injectors, a fire control interface, an internal and autonomous gravity well, and a single main capacitor for powering the gun among other systems. The turret retains a control room or 'cockpit' for two crew members as well as various stations for engineers although, as with the remote version of this turret, these stations do not require manning for the turret to operate. What these direct interfacing features allow for is direct maintenance in the heat of battle and more easy access to the turret's systems in case such a need arises. Outside of the turret is a pressurised 'engineering bay' which houses the primary and backup traverse 'motors' as well as induction rings for the power and data feeds to and from the turret. Beyond this is the main control room. This is the turret's primary means of interfacing with the ship by means of fire control, power modulation, and targetting. Being crew intensive, this gun is well suited and in fact marketed toward the Galactic Empire's Naval and Ground forces specifically. This is due to the fact that manpower within the Navy alone is known to be on the order of tens of trillions of personnel, and that the Empire has a bias toward crewing its ships and installations with more humans and less droids than the decaying Republic which preceded it.

The standard Allegiance-class Star Destroyer (base model) is armed with 3 such weapons systems, along the forward centreline of the bow end of the ship's superstructure. These draw power from the ship's 210m diameter main reactor which lies just below them.