smallest hpa tanks

[C.J.]

That would be sweet, but wouldn't that be more inefficient shot wise than Co2 canisters?

That's why small CO2 tanks are popular. I get as many shots from a 3.5oz as you would from a 22/3000. Don't even THINK of getting a 13/3000 if you're using an Automag.

You may as well get a 9oz CO2 tank and put anti-siphon and a PPS Stabilizer on it. I get about 700 shots on my Classic Mag with that setup.

Your next step up is a 45/4500 tank which makes a lot more sense. Now, if they made "22c.i. 4500 psi" HPA tanks, I'd start getting interested.