I grew up with guns. I used to go hunting with my Dad in the Everglades. We'd camp about a mile from Monroe Station on the Trail. Had my Remington bolt action .22 Rifle and my Remington 12 guage shotgun on a 2 rifle rack right above my bed starting at the age of about 10. I'm all for gun ownership. LOL, I still have those two rifles over 50 years later along with a Glock and some other handguns. You can enact all the laws you want to and it won't change a thing. I have no problem upping the age to 21 to buy certain weapons, but it won't matter. Just like the heroin addict get's his/her illegal heroin, the confused teen will get the gun even if they're underage. You can ban all guns, and the individual who intends to do harm and commit mayhem with assault rifles will get the guns they need to do it with. As
@majus12 said, there are hundreds of millions of guns already in circulation throughout the Country. We have a morality problem in this Country, not a gun problem.