I just bought a knight disc elite and the video that came with it should how to clean the disc extreme with the c-ring. However, the kit that came with the elite did not have a c ring. Does a c ring not come with the Elite, or did I get short changed? What is the best way to clean the elite?

Nope, you didn't get short changed on the gun, just the video. With the elite, no need for the wrench. Just tighten down the screw ( secondary safety), whatever they call it, and twist out the assembly from the shroud or bolt cover.