KWC MAGAZINE GAS CAP

Used in conjunction w/ certain KWC blowback pistol magazines, where the CO2 cartridge is loaded vertically into a vertical slot. The rotating of this screw cap shunts the 12g CO2 cartridge from beneath into the brass piercing nozzle, in order to pressurize the magazine. Please mind to screw the cap on correctly, since if the CO2 cartridge is pierced, then one shouldn't unturn the screw and allow the CO2 to escape at high pressure, is it will cause frostbite and form dry ice where it comes into contact with. Screw the cap on carefully and mindfully, please