This is a rig I made for college. The model and rig are my own, and some of the materials like the circuit board (made by PrinterKiller) and the latex material (made by Bandersnatch) are from Blendswaps' public domain. Hope you have fun with it!
The textures are really good, and the model is very nice. I hope it's okay if i modify the rig a little bit, so the robotic joints can maneuver better, but over all you did a really good job. Karl is a work of art.