Badsb

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?

Badsb

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....

Badsb

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