The G17 gas can be used with all airsoft Japanese airsoft gas pistols, SMG's and shotguns. It contains added lubricant to protect the seals and internal parts of your guns and magazines. Gas is the source of power behind gas blowback weapons. Although there are many gasses of different compositions, the two most popular gasses are Japanese G17 or 134A and Taiwanese green gas. Japanese gas is the lowest powered gas and is meant for use in Japanese GBBs. Taiwanese gas, also known as green gas is for use in Taiwanese GBBs. It has more power than G17, which creates stronger recoil and greater muzzle velocity. Customers can use Green gas in their Japanese GBBs. However, this can decrease the life of the gun. Description: For use ambient temperature is between (from 10C/50F to 40C/104F) This gas has APS3 silicone lubricant blended, thereby maximizing the life of the seals and ensuring low maintenance. Works with: model with fixed slide (from 10C/50F to 40C/104F) recoil system models (from 20C/68F to 40C/104F). To fill the magazine or reservoir with the gas you hold the can upside down vertically and match the nozzle with the port (just like an old butane lighter). Fill in "spurts". Since it is a cold gas allow it to expand between sprays. This saves on gas and won't freeze your magazine. The gun will spit when it is full. If the magazines feels to cold--it is--let it warm up! If you are skirmishing we suggest a back-up mag. Cannot be shipped by air.