This gun puts out 3000 rpm at 400+ fps and the ammo is cheap 6MM plastic airsoft BB\'s. It weighs a hefty 35 pounds (all metal) just like the real mini gun and needs 12 volts to power the motor. The magazine holds 1700 BB\'s which is good for several short bursts. It is the next best thing to actually owning the real thing as far as electric goes. I shredded a coconut and a pineapple
with it at about 15 yards. Naturally the ends of the barrelks are bright orange color.
The internals work similar to gatling guns as there is a cam to cock each of the 6 pistons that are spring loaded in there perspective cylinders for each barrel. Each barrel fires once with each revolution of the cluster. There are some videos if anybody is interested google echo 1 mini gun.
Here are a few more pictures of the gun while disassembling it for examination.