An air gun can be defined in more than one way, either by standard definition or in legal terms. The standard definition is any gun that requires compressed gas or air to fire a projectile. In legal terms, the definition varies by location.
Many countries consider an air gun to be a firearm. There are different classes of firearms, but in many areas, it is illegal to own an air gun without going through the same processes required to own any other type of firearm. There are usually age restrictions as well. Where guns are prohibited entirely, air guns are generally also banned.
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