Hmm my time to shine
If you want to convert propane mag to hpa it can be done, ra-tech sells the adapter mcmaster Carr also. You need a stabilizer as well, Palmer pursuit is the preferred choice. It's gonna cost $250 to setup just to let you know
As for external air, they the strongest kicking, and least recoil gbbr to date. Mags are aeg making it easier to handle.
There's a daytonagun with everything you need to use in the classified right now.
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