Wolverine Co2 upgrade kit for Wraith x HPA

For all the already owners WRAITH X HPA Kit and 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!

Includes:

• Milspec Buffer Tube
• CO2 Expansion Chamber
• 12g cartridge holder and magnetic cap
• Allen Wrench
• O-Ring Kit