Byrna 12G CO2 cartridges are custom fit for the Byrna HD XL, SD XL, HD, SD with Byrna boost adaptor, and Byrna TCR. It is recommended to swap out punctured CO2 cartridges and leave an un-punctured cartridge inside the Byrna HD to avoid any compressed air loss. The Byrna HD will puncture and fire the first round at the same time.
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UMX RWS CLEANING PLTS 177 100/PKG
BYRNA 88 GRAM CO2 CARTRIDGES
CROSMAN SPEEDLOADER KIT 1077 12RD(3)