The NRA and the  American gun lobby have now fully opened Pandora's Box. With paid-for politicians, judges, and "scholars," they have taken a passage out of a more than 200-year-old document and perverted it to mean that everyone having access to firearms of all types is a good thing and a requirement for being an "American." Guns are now so freely available in the US that localized laws have no way of controlling access to guns. These weapons even slop over into Canada and cause immeasurable harm to families in poor neighbourhoods.
I do believe that it may be too late to repair the damage the NRA and the US gun lobby have done.