Here's the Minigun from Terminator2 that I made from PVC pipes and a powerdrill. I guess I'm just showing off a little, like a proud papa.
http://www.angelfire.com/al/metalalien/gatlin_pvc.jpg
Here's my Grandma firing the gun...LOL Notice the barrels spinning?
http://www.angelfire.com/al/metalalien/grandmagun.JPG