Valken Green Gas is a pressurized gas used to power airsoft gas magazines and gas powered grenades. Airsoft green gas is propane with a silicone based oil added to the green gas lubricating O-rings and seals inside airsoft gas products preventing them from drying out and leaking. Green gas delivers approximately 115 psi at 70-degrees Fahrenheit, and their cans are DOT approved. They also have an integrated safety valve to release pressure automatically to reduce explosion risk whenever the pressure exceeds a safety level due to temperature or other reasons. We recommend our Valken AP92 airsoft pistol for use with our green gas.