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P90 Upgrade Problem

P90 Upgrade Problem

I have a problem with my P90.

I am using first M120 spring, with guarder air tight nozzel, systema cyclinder, guarder cyclinder head, systema piston head, 6.04 inner barrel (247mm) and new hop up plastic.  But with this set up... the BB cannot shoot through 2 can side....

But with the M120 spring in my G36K, the BB can shoot through can bottom.......  

Has anyone have similar experience?

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個密氣咀既長度到底係咪真係可以密到氣?
密氣咀有機會係短左...變左氣缸出氣係既, 但係去到hop-up 位就流左出黎, 唔可以入晒管

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would the shim setting have any effect on this? as I just remember that after setting the shims in the gear box the problem started....

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finally resolved the problem..... the O-ring on the systema piston head harden......

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