They found another way, like the binary triggers, bump stocks and pistol braces. Franklin Armory made the Reformation. A non NFA 11.5 in AR with a stock. The key is the straight cut lands and grooves instead of the common twist. I'm just curious how the accuracy will be, but as a HD or truck gun I'm sure it will be accurate enough.
“If a man does his best, what else is there?”
– General George Patton Jr