The American 180

This is the only full auto weapon I've ever fired (department owned) except for a malfunctioning model 60 which I fixed.
That 180 was a hoot, the rate of fire was so high that it was almost a hum rather than a pop pop pop. It was so controllable cutting down a small tree was easy.  Wikipedia says 177 round capacity but my memory tells me it was more like 350 rounds. It took a long time t o load the magazine. If I screwed up loading the mag it would spit them out and I had to start over.
If I won a big lottery I'd buy one.

https://en.m.wikipedia.org/wiki/American-180

If anyone is interested in my malfunctioning glenfield model 60 story, I was at the bench sighting it in for the first time. I pulled the trigger and got a brrt. I asked the other guys if they heard that and nobody noticed it. Ok, maybe my imagination. I pulled the trigger again and brrrrrt, emptying the magazine. Nope not my imagination. I took it home and disassembled it. It was brand new but evidently sat in the rack a few years and the grease had solidified on the sear. A little cleaning cured that problem.