Quote:
Originally Posted by Con Murder
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the M922A1 is okay for CQB only on propane. pointless in outdoor environment as you cannot run it on CO2 at a PSI that is worth fielding.
the XM108HP, XM204HP and XMPB4 are the ones a few of us will only use. CO2 works great but you will need to watch your MED with PSI at or above 600PSI. have to be even more careful when it's hot out!