As used in this chapter, the following terms shall have the meanings indicated:
Any pistol, revolver, rifle, shotgun, air gun or bow and arrow which discharges a bullet, cartridge, shell, shot, arrow, bolt or other missile propelled by the burning or explosion of gunpowder, by high pressure from pumping or other means, by a spring which is set by a cocking operation or by the application and release of tension or pressure to a bowstring attached to such weapon or instrument.