I imagine that if we ever get to a shooting war between .gov and the people, ATF approval of the weapon won’t matter. There are several semi-auto rifles that can be converted to full auto fairly easily. Changing the action can be done far more easily than 30-round magazines can be fabricated. Consequently there are only a few rifles worth converting, namely those that already have a full-auto cousin.
Good point.
I bought several cases each of Mil-spec 20 & 25-rnd AR-10 mags, and 30 & 40-rnd mags AR-15 mags, before the mag ban hits. Extremely well-stocked on ammo, too.
This is gonna get ugly.