I took too much air

out of my RX2's gas ram. So now what? I should have just left well enough alone but in my opinion, my rx2 was charged fully to its max, shooting harsh, which isn't good and hard cocking. So I decided to unscrew the screw where the valve is and tapped it twice. Well twice was too much. So does anyone have a pump I can borrow or tell me how to build one? Thanks a bunch.