* Green gas: Green gas is a mixture of propane and silicone oil. It is more expensive than propane, but it is also more lubricous, which can help to extend the life of your gun. Green gas is also less flammable than propane, making it a safer choice.
* CO2: CO2 is a compressed gas that is more powerful than propane or green gas. This can make it a good choice for desert eagles that are used for hunting or self-defense. However, CO2 can also be more expensive and can be difficult to find.