During the joke of a ban, the same rifles were still for sale with modifications. A name change, removal of the flash suppressor and bayonet lug, 10 round magazine installed, fixed collapsible stock.
and still available all through the joke of a “ban”.
And if you knew where to look, you could find 30 round magazines stamped with “For Police Use Only” on them.
And there were millions of 20 round military surplus magazines everywhere.
I bought lots of military surplus 30 round magazines during the ban.