The argument always goes towards guns like the video of the one you linked to. Don't you realize that weapons like that already have HUGE restrictions on them? No one is suggesting that fully-automatic or very large caliber weapons should be easy to buy. No one. I highly encourage you to go attempt to buy a .50 cal machine gun so you can see how tightly such weapons are controlled by the government. What this argument is about, and what most recent arguments have been about, are small caliber rifles whose public perception have been distorted to such a large extent by the government and media that now the average person whole-heartedly believes they are fully automatic military grade weapons and that they serve no purpose. This is all blatantly false and quite on purpose. Yes, the main ones like the AR-15 and AK-47 resemble military grade hardware, but then again so does every one of the high-powered rifles used a lot in hunting. Their military counterparts are simply seen less because they are not used by every foot soldier.

Yes, the constitution is old, and some of the language in it is completely dated - most of that language has already been changed through amendments. The fact that muskets were the firearm of the era when the 2nd amendment was written does not mean that the 2nd amendment was written to guarantee you the right to bear muskets (By the way, good job on quoting the president there, always good to throw in some of the party rhetoric when trying to make an argument). Weapons evolve, and governments and criminals all move along to the weapons of the era. Our right to bear arms must also evolve to cover the weapons of the era because our right to bear arms is a guarantee of our ability to protect ourselves from those other people who now have those weapons. How safe would you feel if the only weapon you were allowed to have in your San Andreas kit was a muzzle loading musket?

If you haven't read any common sense in these threads then you've been completely misinterpreting what has been being said (which, based on your video link, seems likely). Now if we can just get sini in here to post some pictures to Patriot missiles or nukes and say "why can't we have these? amirite?"