Paintball Co2 Regulator Adapter for CO2 Paintball CGA 320 Cylinder to use with Aquarium CO2 Regulators Paintball CGA 320 Adapter which will let you connect standard CO2 Regulator The thread is made according to UK, Europe, Japan and Taiwan standard (BS341 / DIN477 / W21.8) (DIN477 / W21.8-14 / JIS m22-14) to a Paintball CGA 320 CO2 cylinder.