Airsoft adapter for Blow Back Airsoft guns using the Green Gas

Airsoft adapter for Blow Back Airsoft guns using the Green Gas,

Fits Propane bottles like the Coleman camping (green bottles) found at your local department store.
Scientific testing has proven that most brands of airsoft "green gas" are just propane dressed up with a fancy label!
Propane available for around $3 at your local hardware store or camping supply.