Pressurized gases like propane and HFC134a refrigerant are commonly used to propel BBs by gas-powered guns. Carbon dioxide and nitrogen may also be used aren\’t as popular. Advantages to gas powered guns include adjustable velocities and blowback features. Onboard or magazine stored gas storage systems are used in gas blowback guns or GBBs, using the same compressed air that propels the pellet to pull back the slide. Hence, this feature in BBGs makes them capable of automatic or semi-automatic fire.
Originally developed in Japan during the late 1990s, an automaticpellet fapellet brikett fabrikett electric gun uses electrical power from an onboard battery to drive a motor that turns gears inside the gun to compress and release a piston. This piston creates a blast of air that propels the BB. These airsoft guns are capable of firing 600-900 rounds per minute. AEGs are widely used in competitions today.