This is the second boyle gas gun. It looks awesome this time. I did the deco in version 83.0 :P. It uses aray to heat up boyle gas which creates pressure. Then, when the Store is powered, the hot boyl gas flies along. It was hard to get it to work because I couldn't apply pscn or nscn right in the gas chamber or barrel. The gas also broke pipe and ppip. I also had to put alot of cooling segments. The gas got to max temp when fully heated. I think it still looks good with deco though. This is the first time I use my one push on and off segment that I requested.