This is the problem. When it comes to abortion, there's a notable portion of the populace (including Supreme Court Justices) that say "well it doesn't literally and explicitly call that out in the Consitution so no, it's not a guaranteed right".

... then when it comes to guns... "Well, of course it includes _purchasing_ those arms, even if it doesn't explicitly and literally say so, because it'd be hard to bear them otherwise, so it somehow _must_ guarantee that, too!"

Now go read the listed article ;-)

As far as I can tell the author is just making the tired militia argument while pretending to support an individual right. "Americans have a right to defend their homes". Defend their homes with what exactly? He immediately moves on to hunting weapons and the right to hunt. So according to the author, we have the right to own fudd guns, and the right to self defense (but not with guns, and not outside our home). Yawn!