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FPS problem.
Just bought a used gun, Everything in it is systema or modify systema parts. Gun is wired for deans and im using a magpul pmag hicap. I took it outside to fire it and every second shot seems to drop after 20 feet or finds itself flying horribly left. On fully automatic the bb's seem to spray and drop after 20 feet. Can anyone help me?! Tried tinkering with the hopup with no results.
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