SixNein said:
The problem with many weapons available on the market is the large risk that they impose to the public. A person can rush a crowed with an assault rifle and kill large amounts of people before anyone has the ability to respond. In my opinion, these weapons are primarily offensive.
Remember, assault rifles are not available for sale. And any gun can be used offensively. A gun is gun is a gun generally, they're machinery capable of killing (remember unless you believe in Creationism, then humans are biologically animals, so anything that can kill a human can make an excellent hunting weapon and vice versa). There are AR-15s that fire a larger-caliber round, such as 7.62 mm, that are for hunting larger game, but which otherwise look like an "assault weapon." The U.S. Army's M24 sniper rifle system and the U.S. Marine Corps's M40 sniper rifle system are both based off of one of the most popular hunting rifles in existence, the Remington 700. The 700 is not a civilian version of a military sniper rifle, it's the opposite, those sniper rifles are militarized versions of a hunting rifle. Almost all bolt-action hunting rifles today draw their core design from the Mauser rifles from the late 19th century that were used for military purposes. Then there's all manner of handguns and shotguns that for both civilian, police, or military use.
On a side note, I don't understand the whole "intent of the founding fathers" argument. Their intent was based on a situation entirely different then ours. If they were writing the constitution today, I'm willing to bet it would be different.
Was it? There are plenty of Westernized countries that, given enough economic crisis and radical politics, could experience another tyrannical government. Modern liberal democracies do not make obsolete the right to bear arms regarding a tyrannical government. In the United States, it sounds incredibly rare because of how stable our system is and how large our country is (such an instance would probably lead to another civil war if it really happened). But rare doesn't make it impossible.
Also, the concept of the right to bear arms was not created by the Founding Fathers. A lot of people think the right for people to bear arms was a novel concept because of the war they'd just fought with England, but actually, the right to bear arms goes back to the English Bill of Rights from 1689. By the time the Constitution was being written, the idea that people have a fundamental right to bear arms was something that was considered as normal then as our idea that people have a right to free speech and freedom of religion and so forth today is.
The question was over whether to codify it into the Constitution or not. In terms of what the Founders meant by the word "arms," they meant weapons commonly owned by law-abiding citizens that they would be expected to muster to milita conscription with. At the time, the weapons used for war, hunting, personal protection, etc...were pretty much the same, and really to a good degree, that is still the case. Yes, there are guns designed solely for hunting, but there are plenty of guns used for all of these things, and military guns can easily be adopted for hunting (they make some of the best hunting weapons) and of course for personal protection purposes, and hunting guns can be adopted for military purposes as I've pointed out.
The difference today is that in addition to handguns, rifles, and shotguns, the military has a whole slew of additional weapons that didn't exist before, that are not commonly owned by citizens (tanks, bombs, aircraft, etc...). Now if one wants to say that citizens should have a right to those to be able to stand up to a modern tyrannical government, well that would require amending the Constitution as interpreting the Second Amendment as covering that would likely be a form of right-wing judicial activism as you are stretching the meaning of the word "arms." The left-wing judicial activist argument is that the word arms only meant weapons of the time and not modern weapons, but by that argument, then one could say the First Amendment doesn't apply to modern forms of free speech and the Fourth Amendment doesn't apply against modern forms of search and seizure.
So the word arms today applies to weapons held by both civilians and the military so long as they are commonly-owned types of weapons (handguns, rifles (so long as they are not automatic fire), and shotguns).