Here is a picture of a traditional “laser robot”.  These types of devices are used in precision manufacturing for all kinds of applications.  Microprocessors have been etched using super thin lasers for some time now.  The company that is the biggest in the space is ASM Lithography.

Btw the actual laser they use in this video is a 2W blue laser that is definitely a force to be reckoned with. The remote control can rotate and position the red dot for accuracy. He takes out some balloons and there were some unidentified substances that he took out as well. Anyways always be safe and enjoy the video.

Just a note I don’t think such a robot would be battle bot compliant if you wanted to enter it in a show. The lasers would probably be against the rules as would any robots with projectiles of any type.