As far as I know these have have a pretty standard paintball reg and an 800psi or so output. these are kinda rare as they dont make em anymore, and they fall under the 2/2 rule. Under 2 feet long and under 2inch diameter, so never have to have them tested.
I noticed they are rather long, but for $20 you can get a REALLY short 3000psi reg on ebay. that would take almost a couple inches off.