Byrna Boost SD - 12 gram CO2 AdaptorDescription TAKE YOUR BYRNA HD LAUNCHER 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 to 20 rounds per cartridge. Easy to install. Performance: 6 FPS (Feet per Second) increase in velocity Increased payload: 50% more shots per CO2 canister Convenience: 12g CO2 readily available everywhere 12