that the Federal AWB makes no mention of "interstate commerce"; it defines an "assault weapon", and places prohibitons on "manufacture" and/or "possession".
As an example.
"SWITCHBLADE LEGACY
by Bernard Levine (c)1990
published in KNIFE WORLD August 1990
http://www.knife-expert.com/AUGUST 12, 1958, a date that has faded into obscurity, the
Congress of the United States enacted Public Law 85-623, an
"act to prohibit the introduction, or manufacture for
introduction, into interstate commerce of switchblade knives,
and for other purposes," and sent it on to President
Eisenhower for his signature. Under this act, "The term
'switchblade knife' meant any knife having a blade which
opens automatically --
(1) by hand pressure applied to a button or other device in
the handle of the knife, or
(2) by operation of inertia, gravity, or both."
The maximum penalty for each violation of this law was a
$2,000 fine and five years in jail.
It is not within the constitutional authority of the United
States to ban manufacture or possession of a class of item,
although the individual states have almost unlimited
authority to do so. What the federal government may do,
according to Article I, Section VIII, Clause 3 of the
Constitution, is "To regulate commerce with foreign nations,
and among the several States, and with the Indian tribes."
Using the authority of this "Interstate Commerce" clause,
Congress did the very next thing to banning switchblade
knives."
http://pweb.netcom.com/~brlevine/swbl-leg.txt">More...
The whole article is pretty interesting; substitute "assault weapons" for "switchblades" (in fact, the author makes that comparison), and the argument for regulation isn't that much different than it is nowadays for "assault weapons"... particularly the demonization and fear based on the mis-use and behavior of the irresponsible few).