Do you believe felons should have the right to a gun? Do you believe a individual should be allowed to own his own personal nuclear device? If no, then you do not believe the second amendment protects your personal right to bear arms either.
In many states felons loose the right to own firearms and the right to vote. In some states a convicted persons rights are restored if he does well.
In theory a person who has paid his debt to sociey is done with his obligation. We can ask sex-offenders (including the 18 year old who did it with a 17 year old and got caught) to register for the rest of their lifes. Some convicts should have the rights to weapons restricted also.
If a guy really wants a nuke... let em. We still regulate the plutonium or uranium that makes it go boom. Really a non-question (red herring) on your part. If a person pays Class 3 taxes he can legally own all sorts of bombs and destructive devices. It's the folks who dont pay the taxes we need to worry about. After all setting the thing off is probably against all state and local laws already. The FAA had a few laws on the books about flight close to buildings and we see how those worked out already.
get any firearm they so choose to perpetrate their evil deeds against you including the infamous 50.BMG sniper rifle that can kill you from a mile away with ease.
Most criminals wont obtain a "infamous .50 BMG sniper rifle". At $3500 (or more) per copy and ammo that runs over $5 a round not many 'bangers are into Barrett- style rifles. Making that 'mile shot' ... I dont worry about that and you shouldnt either. I wouldnt figure more than 600 men on the planet are able to make that shot... and just about all have a job in some countries military.
5 go... you many want to work on your non-sequiters and red herrings. Hyperbole is for kids.
~Jeff