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Old July 20th, 2010, 01:42   #5
Official ASC "Dumb Ass"
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Join Date: Jan 2008
Location: Scarbrah, Ontario
14mm ccw threading, screws on the front

the air displacement that a bb creates as it travels down the inner barrel pushes open a plastic membrane in the reducer, the removeable rings can be added or removed to increase/decrease the amount of fps reduction.
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