This true American badass has made a one of a kind Gatling gun from 6 SKS rifles.
After removing the butt stocks, he mounted the rifles into the Gatling rotary device powered by a hand crank like a traditional 19th Century Gatling gun.
As each rifle passes through the cylce the trigger is depressed. It seems pretty clean and can fire as fast as you can spin the crank. Watch him try a 60 round demo in the video below.