Umarex 12‑gram CO2 capsule is a cartridge filled with compressed carbon dioxide, designed to power short and long airguns, RAM markers, and ASG replicas compatible with this type of propulsion. Each capsule is made entirely of metal. The package contains 5 capsules.
A CO2 capsule is an excellent power source, providing high energy for the fired projectile. A single cartridge allows up to 60 shots with consistent muzzle velocity, depending on the model of airgun, replica, or RAM marker. Ambient temperature has a major impact on the number and quality of shots. The lower the temperature, the lower the performance. Remember that a pierced and unused capsule should be removed after 48 hours, as gas pressure may permanently damage the valve seals of the device.