My paint ball gun is leaking out the handle help!!?

Question

I have a Piranaha EVO and when i hook up my co2 thank to the gun it leaks out the handle really fast. My co2 tank is fine plus i have a paintball event in two days i need help!!!!!

Answer 1

The O-ring on the air through grip is probably bad. unscrew it, and replace the O-ring.  

Answer 2

is the o ring bad?