Is a linear pneumatic device legal?
You mean a pneumatic cylinder? Perfectly legal, and also (as long as you use few and of specific sizes) free. See Section 8: The Robot for details. (Oh, and by the way, please put your next question in the appropriate forum. (For this type of question, Rules/Strategy is the place to post.) If you don’t know how to find it, PM me.)
Specifically what we want to use is a SMC MXS style pneumatic slide on robots. It technically is not a cylinder.
no it is not legal.