1. The level of AP banning varies by location
2. Criminals don't care
3. M80A1 and similar are not AP by law (at least federally)
The federal laws in effect ban 9mm AP ammunition (as well as any handgun AP Ammo) by banning the characteristics that would allow the design of the projectile to be functionally AP. Technically you can legally buy and possess 9mm that is AP under federal law, but it’s illegal to sell it, so in effect you cannot buy it. A lot of states have regulations about possessing it, but it’s not something you could easily obtain it.
Given it’s unavailability, I don’t think 9mm is particularly common choice of criminals. If you knew you wanted to pierce armor you’d probably just use an appropriate rifle.
I never said m80a1 wasn’t able to pierce armor... that’s exactly why there are standardized armor ratings. There are many types of legal rifle ammunition that will pierce common types of armor like level IIIa and III. But there is no pistol that uses 7.62x.59 ammunition.
I’m not really sure what point your trying to make at this point.
 
 
		 
 
		 
 
		 
 
		 
 
		 
					
				 
						
					 
 
		 
 
		 
 
		 
 
		 
 
		