i dont know
you guys all probably know this but the rpm wont run on CO2. My freind bought one and tried to run it on CO2 but it broke after about a case of paint. the reg was shot, and the gun tech said whoever wrote you can use CO2 in the manaul was not paying attention during the building. sorry if you already know this and i just wasted all of your time but i dont keep up on these forums.