TAKE YOUR BYRNA SD OR EP LAUNCHER (The HD Launcher uses a different adaptor) TO THE NEXT LEVEL BY UPGRADING TO THE BYRNA BOOST ADAPTOR. This Byrna Boost Adaptor conveniently allows you to use standard and readily available 12 gram CO2 cartridges, delivering an increase in shot capacity up to 30 rounds per cartridge (the actual number of shots available from a cartridge varies according to temperature, humidity, and other factors). Easy to install. Increased payload: 50% more shots per CO2 cartrudge, Convenience: 12g CO2 are more readily available. Compatible with the Byrna SD or EP launchers only.