I received my felt pellets today and fired about five through to clean the barrel and after i decided to try out the pistol and all seemed fine and i thought that the CO2 cartridge was empty so i unscrewed the chamber but a load of gas came out of the top of the pistol and the chamber had it a patch of ice on it and my concerns are could i have damaged the seal or could the freezing have done any damage to the cartridge tube .

Dave