Wolverine CO2 Upgrade Kit for WRAITH X HPA

Already own aWRAITH X HPA Kitand want to add the functionality of CO2? This kit includes the buffer tube, expansion chamber, CO2 cartridge holder and threaded cap so that you can use 12g or 33g CO2 cartridges and use milspec stocks!*Does not include regulator!Milspec Buffer TubeCO2 Expansion Chamber12g cartridge holder and magnetic capAllen WrenchO-Ring Kit