Green gas Vs. C02 there is a big difference between these 2 and of course that's why its a topic, which do you prefer, and which do i prefer? Green gas is effective and keeping the gun running well and staying at a fps low enough to fit just about any field, it also has a large selection of weapons it can be used on, mainly pistols and sub machine guns, but green gas is expensive, and hard to find, unless ordered online, which can be rather annoying to keep ordering online and wait the several weeks for it to arrive, as well its a gas, cant be flown over. C02 on the other hand, is cheap and at many sports stores, which are EVERYWHERE, but it has barely any good airsoft guns to use from, and well they usually exceed the fps limit of a field, of course when used in a larger rifle the smaller canisters you usually find drain out pretty fast, but it could be used effectively in a sniper rifle, or an assault rifle, but usually you go for AEG when it comes to assault rifles, so whats your pick of the crop, green gas, or C02? mine is green gas.