Byrna 88 Gram CO2 Two Pack For Mission-4

Our box of two 88g CO2 cylinders are a perfect fit for the Byrna Mission-4. Each cylinder (new) will be good for approximately 60 rounds (or 3x Mission-4 19-round magazines) at full speed. Punctured cartridges within the Mission-4 CO2 buttstock will leak over time. It is recommended to swap out punctured CO2 cylinders and leave an un-punctured cylinder inside the Mission-4 CO2 buttstock to avoid any compressed gas loss.