Tokyo Marui
Tokyo Marui was the first company to introduce airsoft guns powered solely by electric motor gearbox-driven spring-piston assembly in 1992, which they called "automatic electric gun" (AEG). This compact air pump system was implemented in their first battery-powered automatic firing replica, the FAMAS F1. Other airsoft guns were then introduced. The 3-gear AEG design developed by Tokyo Marui is still in use today, and has been copied numerous times through the years by many other airsoft manufacturers.