It's got a couple of tanks of liquid fuel around the torso, which is fed to a bunch of direct chemical to electrical energy fuel cells. The charge is then sent via a super conducting cable to the laser rifle, which has a stabilised emitter array and can laser-tattoo a cock and balls onto the face of an enemy soldier at a range of 15km, or burn a 5cm hole through his head, depending on the settings.
This guy was painted for the newly released book Nuthin but Mech from DSP, go buy a copy! It's filled with rad robots, from shit hot artists like Feng Zhu, Christian Pearce, Elliot Lilly, and nearly 40 others.
The laser weapon itself is a pulse or burn type, so it can be effective against soft and hard targets. The rear leg is servo driven so the gun can be placed on the ground or suitable surface, and controlled with the detachable interface. The high powered camera sight, in coordination with the stabilised beam emitter means that multiple targets can be tracked and targeted, and all destroyed with the push of a button. I wanted to design a 'functional' laser weapon, that uses the unique properties of beam weapons to its advantage, and looks like a laser, ie: a big cylinder.