Almost all deal with cosmetics versus capability. For example, if your shotgun barrel is under 18 inches your a criminal, if your barrel is 18 inches or more your a good citizen and not a threat to society.
If you have a bayonet lug on your rifle your a criminal, if you don't your not a suspect in the next drive by bayoneting in your neighborhood.
If you have a magazine extension on your shotgun you can't have a pistol grip on the stock. But if you have no pistol grip you "can " have a extended magazine tube :o) See where all this insanity goes ? No where but revenue base BS to make all who have simple rifles or shotguns in their homes subject to fines and or penalities per BS laws as defined by some bean counter that believes a "criminal" will indeed follow HIS/HER law.
The little SOB's that killed the kids at Columbine broke some 30 plus laws and yet polidiots responded with more laws that disarm the responsible men and women we trust our kids safety with every day who could NOT defend them because laws they follow but others don't...........
Do you have a fire extinguisher in your home ? WHY ?
Do you have Insurance on your car ? WHY ?
Do you have a spare tire in the trunk ? WHY ?
My choice to protect me and mine if I can not evade a threat at all costs (except our lives of course) is hampered by someone charging me for the constitutional right to self protection. They use my choice as a law abidding citizen to not rely on Law Enforcement, 20 minutes after I'm attacked, for protection, as a source of revenue and income. That is in and of itself criminal, more so than any criminal on the street as it is subverting the original intent of those who know what an unarmed individual is........... easy pickings for any criminal act. Be sheep if you so desire, but don't demand that I do so just because you have 24 and 7 security detail or live in a better neighborhood or city and have never been attacked or in fear of your life at Oh dark Thirty .
As the national guard was created by congress some 125 years after the signing of the constitution I'll just guess that the framers weren't so visionary that they proposed an amendment for something that wasn't even invented yet.
My 2 cents..........sorry for the rant
Nothing more could be added.
More to the point, given that we have doctors and fire departments, why should anyone need a first-aid kit or a fire extinguisher? Likewise, since we have police departments, why should anyone need a gun? [note: the answers are analagous]