Me and my friend both bought our minis at the same time. We both bought it at a paintball store and when we went to set it up both of them were letting air out. As soon as you put the nitrogen tank on the mini it starts letting air out. We than let the guy fix it for us and he opened it up and played with it got it fixed. Now my friend went to indoor paintball arena and payed $50 enterence fee and for the balls when the same thing happened. Needless to say he is pissed that he wasted $50 and wants to return the gun tomorrow. Do you guys know what this could be..the mini just lets out air as soon as you put the tank on. The guy told us that it was strange that both of our brand new minis had problems like that. Any suggestions on what it could be and how to fix it.