Va. Machine guns have already been illegal in the U.S. for decades, but lately the country has witnessed a brand new surge of weapons effective at automatic fire. Small pieces of plastic or metal applied to convert legal guns into handmade machine guns are helping to gas gun violence. (AP https://machguns.com/product/lot-1460-military-armament-corporation-m10a1-smg-silencer-class-iii-nfa/