Armies will never use them, just too unreliable.
Did you happen to notice that two of my three recommendations were semiautomatic firearms?
I said specifically the 12 ga shotgun. Clearly you have no experience with running mixed loads in a semiauto shotgun, and do not comprehend what a Federal or Aguila mini-shell is.
I just might have an idea. I taught skeet for two years at the University of Southern Mississippi, am a certified instructor by both the NRA and State of Mississippi.
You would have to be really stupid to try anything in an auto that it is not intended to shoot.