Quote:
Originally Posted by mr_nuts31
well a better question would be if a gbb can use compressed air?
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Answer is yes, you need a regulator from HPA tank and an adapter into the charging nozzle.
YouTube- KSC HK USP Match
Also Oxygen has EXTREMELY high psi at room temperature converting it from liquid to gas, it far exceed CO2.
General rule of thumb the BIGGER the molcular mass the higher the melting point and the lower the pressure.
Propane is C3H8 =44.11g/ mol
Where butane C4H10 = 58.12 g/mol
There are exceptions to that rule, (bond strength between molecule) but generally that's how it goes
I believe if you want higher pressure consider R-410A I think, Gun gas forum had people used that. Works pretty well in their Pro-Win mags, trouble is getting that gas is impossible in Canada basically.
See here
http://www.gasguns.info/forum/viewto...3091&hilit=hfc