You can make your own fake gatling gun

 I hadn't added an ammo belt yet to this cosplay minigun, but the delinker does have the ammunition chute dock on the side here. By this last Sprig, my minigun design had really evolved into something fantastic. You could take this bright orange one all apart without using tools, and just as easily pop it all right back together. The barrels are metal conduit, the rest is 1/4" thick plastic.

A costume minigun should have barrels that spin when you squeeze the trigger, this one that I developed does! Want to build your own costume or event Gatling gun? I've got CAD files, PDF's, and trace and cut JPG files for you at www.mrminigun.com

One of my early minigun gatlings

I based this one on the gun in Predator, kinda. Too small, too little detail but it WORKED.  Non-firing, but the barrels spun at a good 900rpm with a fresh drill battery attached. I went on to build literally hundreds of these crazy costume Gatling gun. The barrels are 1/2" conduit, the body cut from 6mm thick ABS plastic from Interstate Plastics in Sacramento.
YOU can build a much nicer one, get the CAD files for this Minigun Gatling Dummy at www.mrminigun.com

$999.00 Miniguns?

Here's video of my latest M134 movie prop guns. More information at:  www.mrminigun.com