8 GRAM CO2 CARTRIDGES ARE ONLY COMPATIBLE WITH THE BYRNA SD.

Our box of ten 8g CO2 cartridges are custom fit for the Byrna SD and HD Launchers. Now including 1 CO2 cartridge with oil for simple maintenance every 10 CO2 cartridges used. Each cartridge (new) will be good for 15-20 rounds (4 mags in a 5 round magazine) at full speed. Punctured cartridges within the Byrna SD will leak over time.

It is recommended to swap out punctured CO2 cartridges and leave an un-punctured cartridge inside the Byrna SD to avoid any compressed air loss. The Byrna SD will puncture and fire the first round at the same time.