Gas airsoft guns are becoming more and more popular across the U. S. For their realism, functionality, accuracy, and cost of operation, to name only a few of the countless reasons. The propellant used to fire this type of guns is a crucial aspect in their operation as well as their maintenance. A few of the most often used propellants are 134A, green gas, and CO2.
The gas that should be used in any particular airsoft gun should be determined by more than one factor. First of all, the temperature in which the gun is being used can affect the gas pressure which in turn affects the gun’s firing power. Since one propellant may be appropriate in one temperature may be also be harmful to use in, say, a temperature that is 30 degrees Fahrenheit warmer, the fact that most gas type guns are designed for only one type of propellant is indeed a common problem.
As hot weather can cause gas to become too powerful, cold weather can render an airsoft gun useless. This is because the cold temperature reduces the gas pressure, which in turn disables the firing action since there’s no power behind the shot. Another problem that can occur in cold weather is the valve may remain open after taking a shot, which will let the rest of the gas seep.
So you should consider both the manufacturer’s suggested propellant as well as the temperature in which you plan to use in order to ensure the safe and proper operation of your airsoft gun. You want to avoid using a gas that is too powerful as it may damage some gun components.
134A is usually used in Japanese made gas guns, but there are some brands of other origins that use this gas as well. It can be used in temperatures anywhere above 40 degrees Fahrenheit, though a general rule of thumb is to upgrade to green gas when the gun begins to misfire.
Green gas is the most frequently used propellant for an airsoft gun. If the airsoft gun you have is not made in Japan, it is likely designed to work best with green gas as its propellant. It’s important to pay attention to the climate when using green gas as it is too powerful for most summer climates and can destroy your gun.
There are so many different kinds of airsoft guns using green gas that it’s impossible to determine the maximum temperature at which point the propellant should be changed to something like 134A. Higher quality guns can withstand higher temperatures and lower quality guns can become damaged more easily by use in warm weather, so it’s up to you to pay attention to the temperature and amount of direct sunlight to which the airsoft gun is exposed. One tip to remember is continuous firing will decrease pressure in the gas chamber, subsequently lowering the internal temperature.
The most versatile gas propellant for an airsoft gun would be CO2; however, guns that use CO2 are notorious for being complicated and difficult to maintain. CO2 guns are few and far between, can become costly, and very rarely take any other type of gas. For these reasons and more, CO2 guns have the smallest following in the airsoft community.