pellet gun

An air gun is any kind of small arms that propels projectiles by means of high-pressure compressed air or other gases which involves no chemical reactions, in contrast to explosive propellant of a firearm which involves an exothermic chemical reaction. Both the rifle and handgun forms (air rifle and air pistol) typically propel metallic projectiles, either the non-spherical pellets, or the spherical BBs. Certain types of air guns (usually rifles) may also propel arrows or darts. The first air guns were developed in the 1500s. The guns have been used in hunting, sporting and warfare. Air guns use three types of power, depending on the design: spring-piston, pneumatic and compressed carbon dioxide.

View More On Wikipedia.org