The top of the line in Airsoft Guns is electric airsoft guns, powered by a battery. They shoot around 750 rounds per minute fully automatically with superior reliability! And they don't have to be recharged as often as gas operated guns, and there are no heavy gas cartridges to carry. Normal operation (depending on battery size) can last anwhere from 600 to 3,000 rounds. A basic rule of thumb for battery consumption and life is each mah rating a battery has is equivalent to firing one BB / pellet.