G3A3 Mini Electric Fully automatic airsoft mini machine gun. Fires 6mm Plastic BBs. Holds up to 75 rounds at a time. Fires 300 rounds per minute at 120-200 fps. These shoot farther and faster than most full auto airsoft guns. You will not be disappointed with the quality or the durability. This gun is constructed of ABS plastic which is the most durable around. To load this gun you pull back a little slide on the rear site. The 4 double a batteries go into the handle. There is a little safety on the site which you have to push to get the gun to fire. This gun is made by UHC.