everytime i shoot paintballs outta my gun on semi or auto only one ball shoots...theres no ball stuck in it....co2 is full and the battery is full
what could be causing this?

Make sure the bolt is properly connected to the striker. There's a vertical pin that goes through the bolt into the striker. If it's not fully in the striker or not in the hole on the striker, it could push the bolt forward but not back.

Or the trigger needs adjusting. There's a switch activation screw (middle of the trigger), if it's too far in, the microswitch won't reset, thus no more shooting.

The rear frame screw could be loose, causing the sear (inside the top part of the trigger frame) not to catch the striker after shooting but usually the gun will do sort of a full auto thing without you pressing the trigger if that's the case.

Are there any leaks? That could also help diagnose the problem if it's different than those above.