Help: Tippmann m4 shoots on its own
Hey folks, I recently acquired a used tippmann m4 on the classified section here.
The previous owner mentioned an issue with full auto not working properly but semi was fine.
Only internal mods are a tdc mod and a pdi barrel.
Now when I plug in the hose and open the valve, the line fills up. If I try to shot, nothing happens. If I pull the charging handle and release it, it starts shooting full auto without pulling the trigger and wont stop until I shut the air flow....
Any one can help or point what i'm doing wrong?
Any help will be much appreciated
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