There is usually only a token nod to interstate commerce, but it still exists. As one example, there was a federal law known as the Gun Free School Zones Act t

There is usually only a token nod to interstate commerce, but it still exists. As one example, there was a federal law known as the Gun Free School Zones Act that banned possessing a firearm within 1500 feet of a school (unless it was on private property, encased and locked, the possessor had a concealed pistol license, or a couple of other exceptions). In the case US v. Lopez, it got shot down as unconstitutional. It immediately got re-passed with the caveat that it affected any firearm that "has moved in or that otherwise affects interstate or foreign commerce", which of course is almost all of them.