Rush Limbaugh says that (and I paraphrase), "if liberals interpreted the Second Amendment the same way they do the rest of the Bill of Rights, gun ownership would be mandatory."
I agree with him.
Shortly after the second amendment was ratified, it was. Not only was ownership of a firearm mandatory, they told you, with fairly broad limits, what kind and of what caliber, you had to have. You could of course have others if you wished.