Having fired 22mag out of a short barrel revolver I imagine this one should make an interesting fireball.
Interesting concept but for that audience it needs a 22lr cylinder for practice. The blast from the 22mag will scare some of the shooters away.
"At this point, clued-in firearm enthusiasts might be asking how the S333 doesn't run afoul of NFA machine-gun laws, which prohibit new-manufacture machine guns from being sold to civilians. After all, the ATF's definition of a machine gun is a firearm that "fires more than one round with each pull of the trigger," just like the S333. However, the ATF does make an exception for "volley guns" and allows the manufacture and sale of firearms that fire more than one round with each pull of the trigger, provided that those rounds are fired from separate barrels."
The concept and practical use for someone who has weak hands...… OK. That short barrel on a 22 magnum..... whoa! I would imagine that would be insanely LOUD!