For those who use these little cartridges, you know how quickly the price can add up. [steve] takes us through the process of adding a valve to a spent cartridge so it can be refilled.

Although compact, CO2 air pumps would have to travel without any installed or spare gas cartridges, and then you would have ...

CO2 quality is critically important to the health ... Number of rounds per capsule depends on the specific air gun. Available in 12-gram cartridges or 88-gram cartridges. Only available for ...