you dont understand. i am positive there is air in it, and yes its nothing to do with my gat. the air wont come out of the bottle. when the tank gets empty enough and the pressure drops enough you can push the pin in at the top and air comes out. if the pressure is high you shouldnt be able to push the pin in yourself (esp not with your thunmb) but i can push my pinn al the way down as far as it goes and no air comes out. i definately have air in it i am certain.