I'm sure for someone who knows what they're doing, they can convert a gun to hpa.
for someone who has to ask what's going on, I don't suggest it right out of the starting gates.
Also hpa guns you're dealing with ridiculous pressure. I don't believe your regular garage compressor can get high enough to charge an hpa tank for paintball or airsoft.
someone with a P* or DG can chime in here on what their air rigs are charged up to.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.