Yep. Dosen’t everyone know that there are several editions of semi-auto revolvers? The Mateba being the most recent attempt at marketing the idea.
Webley made one, as did a few others mainly in the early/mid 20th century.
I am waiting for soneone to tell us that a cut barreled Mini-14 won’t function....oh wait, someone already has. oops.
Also, it is not unfeasible that indeed at 9mm revolver could unleash a “salvo” of 12 rounds ratehr quickly- ever watch Jerry Miculek and his SW 25 45 ACP with full moon clips? He shoots and reloads faster than most competitors with 1911s etc. Holds many speed and accuracy records with a revolver he makes talk like a mini-gun....
And finally, almost all centerfire rifle cartridges will defeat body armor (like the stuff cops and civilians use (threat level 2A, 3 or 3A with or w/o trauma plates) espc. at close to medium range.
Concealable armor defeats pistol shotgun and maybe sub-gun (pistol) rounds.
leve 4 is where rifle bullets are stopped, but often with quite aresultant boo-boo from teh energy transfer.
Sawing off the barrel of a Mini-14 could theoretically affect functioning. It would change the pressure curve by at least some amount.
Probably would still work but it is at least something to consider, even if it was legal.