Automotive HFC 134a filler tool!
DisclaimerDO THIS AT YOUR OWN RISK!!!! anything can happen when you do anything, This information is a possible solution, by choosing to attempt to build USE this filler adapter you are accepting the full risk of injury.
This current version of the filler adapter had many contributors to its final design, namely Breech, Onefuji, and Gordak, If I missed anyone sorry.
HFC 134a the Cheaper, easier, better way to fill you Japanese airsoft guns.
Finally, you can get gas at the local auto parts store, and actually SEE the fluid go into the magazine! You will know without question that you magazine has a full charge, giving you confidence in battle!
What you need