Automatic Electric Guns (AEGs)
are BB guns that use battery and motor as power source. Among all
manufacturers, Marui is the most popular and reliable one. From law
enforcement SMGs like the MP5, to military rifles like the M4A1, Marui has
done a good job on the replicas either on the appearance or the ease of
maintenance. Another manufacturer, "TOP", specializes in light machine
guns like the FN M249 Minimi & M60 Series.