Had an interesting debate with my aunt earlier this week (definitely not in our camp, but I still love her dearly). What it came down to was two things we didn't really have a good answer to:
1) How does a government--one that's of / by / for the people--effectively prevent people who shouldn't have access to firearms from obtaining them, without infringing on the rights of everyone else? Registration, background checks, 'firearms licenses', are all things that don't sit well with us. If those aren't appropriate or acceptable, what methods and measures would be proper to prevent violent criminals and people with mental health problems from getting weapons they shouldn't have? Should people with mental health conditions who've been treated or recovered have an appeals and rights-restoration process?
2) We have the right to bear arms, for ourselves and for the common militia. What my aunt and I couldn't settle on was how big a militia we're talking about. When the Founding Fathers wrote the 2nd Amendment, the cutting edge in weapons of warfare were smoothbore black powder muskets, muzzle-loading cannons, and naval frigates. I don't think they took GPS-guided bombs, F-22s, 105mm howitzers, M1 Abrahms, shoulder-fired SAMs, and thermonuclear weapons into consideration. But we have to.
So: where do we draw the line? Do we draw a line? I'd love to own an F-14D (if I had that kind of cash. :\ )--I'd hate to think of one in the hands of somebody who wanted to harm my country. MANPADS would be crucial to a people resisting the modern military of a corrupt government or a foreign invasion (the whole point of a militia!), but they're a terrorist's wet dream.
".5 inches if rifled" is a pretty arbitrary benchmark for what private citizens can and cannot have (without bending over for the JBTs). I can own a modern Barret, but I can't own a WWII Soviet 14.5mm PTRS, which is essentially the same type of rifle but slightly larger and single-shot? Wait, how do I keep Mr. Previously-Upstanding-But-Now-Disgruntled Citizen over there from buying one, too, and blowing away something or somebody important? Where do we make the call that something is 'big' or 'powerful' enough that it isn't appropriate anymore for private citizens to posess it, and only for the formal military force that represents those citizens? Who decides, what criteria do they use, and what recourse do we get if they make a dumb call?
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I'm most interested in the first one--what measures do we institute to keep bad guys and people with serious mental health problems from buying a gun off the shelf and doing something bad with it? Let's assume we've won--the import ban and manufacturing ban are gone, everything is transferable (or better yet, you don't have to fill out paperwork), no state-level restrictions, the works.
How do we stop a badguy from walking into a dealer and paying cash for your average Mac-10 (which is probably about $4-500 now that the bans are gone and sales are flying), then going over to his ex-girlfriend's house, wasting her and her two year old son, taking her cash, and treating himself to his new set of pimp rims?
AND--
How do we do that without infringing on the rights or privacy of a law-abiding citizen who wants a FA firearm?