So then this
regulator would be good to use with an adapter?
What other components besides the regulator, solenoid, cartridge, and diffuser would I need?
Yes. The cool think about using that on a paintball tank is that it will be upright too, so it will take advantage of the design/look of the reg.
You will need the regulator (which comes with a solenoid), paintball tank in the size you want (not a cartridge, it's a small tank), adapter (cga 320 paintball adapter), diffuser, check valve (GLA sells nice metal ones), CO2 tubing, and a timer. Then you would be set.
I am not all that sure of the quality of that particular regulator so I am not saying to go with it or not, GLA sells quality stuff and I trust them, I just don't know anything about it.