silencer wont be that effective since you will end up with the pilot opening crack,HERE IT IS.
ALSO ,the waste of hpa during the piloting of piston valve,give me an idea for valve system provides three major advantages :
*fast open time
*huge air flow
*air exit just from one hole
that leaded me to this design
http://www.spudfiles.com/forums/will-th ... 23001.html

here is what i made ,the core parts.
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