The reason I am adamantly opposed to these measures are for these reasons:
http://www.jpfo.org/NaziLawEnglish.htm
http://www.jpfo.org/DbyGCp3.pdf
I have a problem with raising the age of firearm ownership to 21. If we can vote, enlist, fight and die in war, we can be trusted to buy a rifle and go home with it. I don't have a problem with the aprt about prosecuting people for negligence though.
As for gunshows, it is a restriction of the right to peacably assemble and restricts even the freedom of speech, right to privacy, and trade laws for those who attend.
Banning toy guns is just stupid, mandating that all "toy guns" are colored to distinctly mark them as fake (like the orange muzzle now seen on toys) makes more sense to me than to ban toy guns.
And you should take to heart and remember that a firearm is nothing more than a piece of machinery. It isn't the machine that kills people, it's the person who operates the machine that kills people. Saying that guns kill people is like saying that vehicles are the sole cause of traffic accidents. And that train of thought is blatantly false.
And I do know why it was written, what it means, and who it applies to. The militia, whether organized or unorganized, have the right to keep and bear arms as they choose. And it applies to all U.S. citizens, that is who the 2nd amendment was written for.