johnnyblast01-27-2006, 01:45 PMthe tank was just low, i told him not to use his co2 without his expansion chamber. i also told him to check the o rings and other parts. he took out his expansion chamber to install regulator but it was a wrong model. when he returned his regulator he forgot where he put his expansion chamber and his nitro tank is at PMI for refill i guess... thanks for the help guy