What state's rights are involved here, logajan? Go read the Tenth Amendment again. It says that state's rights do not include those rights denied to the state by the Constitution. And in that regard, the fundamental prohibition against infringement in the Second Amendment is not limited to infringement only by Congress, it prohibits any infringement whatsoever. Therefore, gun control is not a power reserved to the states by the Tenth Amendment and is, in fact, prohibited to it by the Second Amendment.
Go peddle your libertarian claptrap somewhere else. This is an issue for honest conservatives.
--Boot Hill
You seem to need a little history lesson in how this whole issue has played out the last 200 years. It was originally held that the US Constitution only limited federal authority, not state authority. After the 14th amendment, the Supreme Court grudgingly started applying US Constitutional limits on state governments as well. Even to this day there is nonuniform application of US Constitutional restrictions on state governments versus the federal government.
The issue is not nearly as neatly settled even today as you seem to think, and there exists real division on the question even in conservative factions.