That's by the way. The bottom line is that there is a segment of the firearms-oriented public that sees individual ownership as a "bulwark against tyranny". These people take this quite seriously.... I don't know how many there might be but it's a frequent sentiment heard on gun forums.
The Supreme Court certainly didn't take that argument seriously. They argued that the individual right doesn't have to be tied to any such thing, and that individuals can keep guns to protect their homes and selves (although I think the argument that they offer "protection" is going to be undermined by science*).
If the "bulwark against tyranny" argument were true, then the 2nd Amendment would have to guarantee an individual right to own chemical, biological and nuclear arms also. (As I like to point out, the 2nd Amendment says nothing about "guns" or even "firearms" and many of the guns we talk about now were no more foreseeable to the framers of the Constitution than were chemical, biological or nuclear arms.) After all, the potentially tyrannical government has access to such arms.
At any rate, I have no problem with the individual right to own guns. As with all rights, it isn't unlimited. Even free speech rights aren't unlimited, though there are very few cases when a legitimate state interest (usually public safety) outweighs the speech right. With guns I think the legitimate state interest in public safety
often outweighs the individual right.
So what's left to debate is not whether or not government can regulate gun ownership,
but what kinds of regulations are likely to be the most effective. That's a tougher nut to crack, but it's really where the debate ought be focused.
And as always, I think the debate should also focus on the single largest class of gun deaths: suicide. I don't think the debate should focus on good guys vs. bad guys and fantasies of heroic actions, but on the actual facts.
And the fact is that there are more gun deaths due to suicide than there are due to accidents and homicides combined.
I'm not really sure what laws could best reduce the number of gun deaths (maybe trigger locks on handguns? more money spent on educating gun owners?) but this is where we need to focus our attention.
* For example, "A study of 626 shootings in or around a residence in three U.S. cities revealed that, for every time a gun in the home was used in a self-defense or legally justifiable shooting, there were four unintentional shootings, seven criminal assaults or homicides, and 11 attempted or completed suicides (Kellermann et al, 1998)." Source.