[Zfurlong]

ill start from the very beginning to make things as easy to understand as possible.
- you have a tank currently, that has an output of 8-900 psi
- you will need a regulator that will accept 8-900 psi and regulate that down to about 100-160psi (pending parts in your pistol). the reason for this, is that is roughly the psi that propane/greengas puts out, so you will need something near that same pressure
if you are open to the idea, there are dedicated SLP (super low pressure) tanks available on the market specifically for hpa (you should still use a regulator with them though)
- you do not necessarily need to get the cqb Russian valves or any dedicated valves like that for turning your pistol hpa. any 1/8 air hose connector will do the same job (I use them on some of my builds), the benefit of these are that they are more durable than the cqb Russian valves, the downside, is that there is a bit more work involved as you will need to drill then tap the hole (with the correct threads) into your mag
- hpa is extremely dry compared to greengas and will dry out the seals on your guns unless maintained properly (2-3 drops of SILICON oil into the mags where you connect the hpa line to every 5-6 mags worth of shooting should be fine)
- I would recommend keeping a few mags as greengas/propane due to some fields I have come across over the years having a straight up hpa ban.