This is ironic. All US gun control laws are set on the precedent of US vs. Miller in 1936.
Miller committed a crime with a sawed off shotgun. Since the military didn't use such a weapon, and it was considered unsuitable for militia use, the government saw fit to put restrictions on sawed-off shotguns.
Ironic that now we're tying to restrict gun specificially BECAUSE the military uses them and they're suitable for militia use.