Personally a 22 cal to the shin will keep them from throwing rocks for a few weeks but I think a 223/5.56 at 28K-30K fps to the chin, oops I meant shin will keep them out of the fight for a long time if not for ever. Oh how political correctness has taken over warfare. Oh, I forgot, that depends on whose side you are on doesn't it.
If you could hit them in the shin, couldn’t you hit them in the knee?
wouldn’t a knee shot be forever?