Combat, mine has the older jug and piston also. I would like a two-ring setup, but ordering parts for this seems like a crapshoot. I've ordered the carb rebuild kit 3 times and have got three slightly different variations of the same kit. They work, but each kit has different extra pieces in it. I'm not sure if I order a piston assembly that I will get what I want. I'm using the 720r parts schematic. Perhaps there is a different one for the newer pieces?