Regulator question

[Sinsemillia]

Is it worth it to get a regulator vs. a expansion chamber? I do run a remote set-up, and isnt that basically a expansion chamber? I do run co2 right now, but will be switching to hpa....(scuba store opened up a few miles away;)) Do regulators even "work" on co2? thanks!

[Ace24]

Regulator is only necessary when converting your gun to LP (Low Pressure).

I'm running HPA on my MR1 and have always ran it on HPA and it runs fine without any modification. (I do however have macroline running into it now instead of the steel hose)