An air gun (air rifle or air pistol) is a rifle or pistol which fires projectiles by means of compressed air or other gas, in contrast to a firearm which uses an explosion or combustion of a propellant. Air guns are used for hunting, leisurely recreational shooting (commonly known as plinking), and precision sports, such as the Olympic 10 m Air Rifle and 10 m Air Pistol events.
Most air guns use metallic projectiles as ammunition. Air guns that only use plastic projectiles are further classified as airsoft guns.
BB guns are a type of air gun designed to shoot projectiles called BB after the Birdshot pellet of approximately the same size.airsoft gun
An airsoft gun is a type of gun used for recreational purposes, and firing nonlethal projectiles.原諒我懶惰，實在很欄得幫大家翻，我想這些應該一邊查字典都不難懂
空氣槍方面，實際上包含打獵用的空氣槍，台灣一般都直接把玩具空氣槍簡稱空氣槍，英文中則會分air gun跟airsoft gun，不過這也許跟台灣(大陸那邊應該也是)禁止私人持有真槍有關。