It was never interpreted by the supreme court to only apply to a well-regulated militia. At most, you could say the right was interpreted to only apply to guns

It was never interpreted by the supreme court to only apply to a well-regulated militia. At most, you could say the right was interpreted to only apply to guns used by a well-regulated militia in the 1930s. But before that there were no federal gun control laws, so the issue never came up.