that gun looks insane :D how do you time the feed system so it shoots when it is aligned with the barrel?

I don't.

It's mainly a glorified straffer gun. The BB's are shoot from a hidden barrel inside the rotating 6 others.

I know it's lame but we don't have the time nor the money to make the complex mechanism to shoot 1.5" higher by the rotating barrels.

lol oooooooooooooooooo still kool :P