22 cal long rifle, 10 barrels, 400 rounds / minute
Look closely to see the bullets get used up in the stick magazine
Look closely to see the brass ejected from the side of the gun.
I shoot at least 1500 rounds each time I take it out.
I got two of these things, one on a carrage and one on a tripod.
Each one took 500 hours to build. Except for a few screws and springs, all parts were machined in the basement.