I recently purchased an Impulse from a friend of mine and all I have is CO2. I know that CO2 can have some damaging affects and I don't want that to happen to a gun I spent that much on. So, my question is what is a good fairly inexpensive HPA tank that will give me good performance and won't cost me an arm and a leg.
Also I was wondering if there was anything I had to do to the gun when I switch from CO2 to HPA.