There is something that really muddies things up at a Federal level.

Heller v DC

We have the right to arms "That are in common usage".
A "class" of firearm may not be banned.

The interpretation arguments of the 2cnd have pretty well run their course. The .gov really does not have anything supporting a ban.
However a caviat-Heller did open up "regulation" and lays a lot of weight on states authority.

We still need the letters, emails and calls at all levels to continue.
We can make a difference

We Shall Not Bow