Guys I need to lower my fps on my KM4 from 390 to 350 fps with .20 bb. What is the best way to do this either a new cylinder or new spring? If spring could you suggest what spring to use? If cylinder please do the same. Thanks for your help.
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KM 4 downgrade
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rccapps
, Today, 01:46 AM
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rccapps
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Posted Today, 01:46 AM
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