I don't know how YOUR state works, but in every state I've lived in, the state constitutions have had an equivalent of the second amendment.
Try again.
States have always been able to restrict ownership of various firearms.
Every state you ever lived in.
The Second protects that power from the feds.
Incorporating the 2nd under the 14th will require that a minimum federal standard of 2nd amendment right be sestablished and enforced upon the states (they will be able to exceed that minimum- but not fall below it).
If that is done faithfully to the Constitution it will be like Keyes envisions here. Advanced weapons will be more restricted, but available.