Letter: No gun restrictions are in Constitution
There are no circumstances for restrictions of any gun rights in the Constitution!
The founders gave a great deal of thought to this freedom. In fact, their ridged position made no provisions for number type of "arms."
Nor even any restriction that could be "legislated" into being. The sacred purpose was to ensure that no list of registered gun owners could fall into the hands of an oppressive agent or government.
What easier way than to use "the list" to remove any resistance to invasion. Couple this with the assurance that no soldiers would be quartered in private residences without consent.
Both the Second and Third amendments confirm those rights to form a militia, bear arms and to be secure in their own homes. It seems logical to me that if the "potential invader" knew "who" had "what" weapons, those safeguards would mean little more than a logistics problem, easily overcome.
There is no political event that can change those guaranteed freedoms. Social endeavors are not a satisfactory substitute for the law of the land. Social concerns for the irrational behavior of some must be addressed in a constitutional manner, not one resembling a dictatorship.
In any event, the only changes in the constitutionality of gun rights, comes through constitutional amendment, or at the very least, through the state's rights and powers of the Ninth and 10th amendments as enumerated by "reservation" to "We the People!" In other words: Hands off, Democrats.