I am a student at JSU. The teachers and student came up with a new class where student build a robot with a paintball gun attach. To battle the other student and also targeting practice. We design are own robots just kept trying different things. We program the robot with the controller for the battle. We use the tank kit with four motors, a motor on the trigger, and a motor to rise and lower the gun. The hardest part off the class was making the robot run by it self for 33 feet and find a object and shoot at it 5 times. The problem was the we couldn't sonar to line up perfectly with the object every time. unfortunately we ran out of time and we just had to may it run 33 feet then line it up will the object and make it shoot 5 times. The class what a blast I have attach pictures and videos.

Is a paintball gun robot illegal isnt it ?

It does depend on the country, but as far as legality goes if the marker and its usage is allowed, a robot created to control and fire it should be too. As far as field legality, though, I don't think you'll see any of these on a tournament field any time soon (although I have seen some very unique, semi-autonomous marker/robotic designs at some of the larger simulation games).