This screw in CO2 adapter for paintball threads into the air source or bottle adapter on any paintball gun designed to use CO2 as a power source, allowing the user to power their paintball gun with disposable Valken 90 Gram CO2 cartridges. This 90 gram CO2 adapter is safe and simple to install and operate, allowing the user to power their paintball gun with much larger, 90 gram cartridges to obtain more shots before replacement is required.