So are you guys saying that I would be able to use propane or no?

Is there any other route I could take for a regulated power source cause I do not just have 150 dollars laying around at the moment

If that is the case, then how do I Have a psi regulator and hpa tank that is portable?

I am some what new to pneumatic cannons. I am going to build an Inline Vortex bbmg for airsoft but the only thing is im not totally sure on how to power it off of Co2. So I was wondering how i could use a 20oz paintball Co2 can to power it cost effectively. I would need a regulator so i could see ...