dont count on me, but im pretty sure it's pressure rated up to 30psi, even though a paintball tank is only like 5-8psi, sooo...
Paintball tanks are definitely not 5-8psi. Paintball CO2 tanks still give the same 800~1000psi that a regular cylinder does as long as it contains liquid CO2. I'm not sure about the cartridges, though.
As far as GLA's atomic regulators go, they are rated at least 30psi output pressure to be compatible with their atomic diffusers.