High-pressure Caron Dioxide is extremely dangerous and the pages showing Steve,s work on and with re-filling Co2 cartridges and the 88 gram Airsource cylinders is presented for information only.

 If you chose to copy or to take inspiration from this work you do so entirely at your own risk.

In Short:- You build it, it breaks you get to keep the bits , if some one or some thing gets damaged it's your problem. Likewise if it just does not work, too bad it's still your problem.

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88g Refillable Airsource

            The above photo is of the current level of design for 88g refillable CO2 cartridges. The previous designs no longer exist due to the initial cost of these cartridges, as the design progressed the cylinders and valves were up dated to the current level.

            The first level of design used a vehicle air conditioning charging port plus high pressure Schrader. The charging port was machined and loctited into the neck of the Airsource cartridge the same as the current 12g cartridge but on a larger scale. Unfortunately the tip of the Schrader was not wide enough to contact the piercing tip of the test rifle consistently.

            The second design is basically what you see above machined entirely from brass and using “O” ring seals, the problem with this design was the piercing tip is harder than the brass causing valve tip to burr.

            The current design which is in the cartridge on the left has the valve tip made from steel and the blued. This is much more reliable and resilient to the piercing tip, however further changes are planned.

            No specific charging kit has been made for the 88g cartridges, at present an adapter is used to convert the end of the Airsource to the same profile of a 12g cartridge. With the adapter in place the 88g gram cartridges can then be filled using the ram charger. Due to the size and shot capacity of the 88g cartridges it is not planned to produce a pocket charger. A more robust adapter for the ram charger is planned but not until the 88g cartridge valve has been finalized.

            Adapter for ram charger.