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CR600W CO2 air leak- repair/ repair sites

The most common cause I’ve seen is the face seal on the valve. A -009 O-ring in 90 durometer is all you need to fix it.

The gun is easy to disassemble and reassemble.

The other possibility is the poppet is leaking. If that is the case, make sure the bolt is closed and put a balloon over the end of the barrel. If it inflates, the poppet is bad.