I am not in agreement. If the First and Second amendments are to be applied equally as inalienable rights, then the states, per the 10th amendment, have domain over all other things not in the constitution granted the Federal government, but not in the matter of gun control. If the state wants to regulate cars, go for it. If they want to regulate pot, go for it. If they want to occupy your home with state soldiers, hold your horses (3rd amendment protection)...
Freedom of speech is protected. Period. Freedom to be armed in defense is, and should be protected. Period.
The entire Bill of Rights was directed at the federal government. States routinely violated it with state funded religion, elimination of the Right to Free Speech as well as infringements on guns.
Of course, the amendment does not define the word “infringement” and the states could interpret that for themselves. Does anyone believe states cannot restrict the mentally ill from owning guns or felons?