The Byrna 8g CO2 cartridges are customised to fit the Byrna HD launcher. Each cartridge (new) should reliably fire up to 15-20 projectiles (4 magazines with 5 projectiles in each), one after the
other, at full speed. Punctured cartridges left in the Byrna launcher will leak over time. It is highly recommended to replace a punctured CO2 cartridge after use, with a new cartridge, therefore
ensuring that your Byrna launcher is always ready to fire at maximum strength.

The Byrna HD will puncture the CO2 cartridge and fire the first round at the same time.