[Pyxl101]

It was not the NRA that pushed for this interpretation. If you are interested in the Second Amendment, I recommend reading this US Supreme Court Case opinion in full: https://www.law.cornell.edu/supct/html/07-290.ZO.html

It explains the meaning of the words and phrases, and their intention, and provides ample justification in the way of founding-era sources.

> There are many reasons why the militia was thought to be “necessary to the security of a free state.” [...] When the able-bodied men of a nation are trained in arms and organized, they are better able to resist tyranny. [...]

> That of the nine state constitutional protections for the right to bear arms enacted immediately after 1789 at least seven unequivocally protected an individual citizen’s right to self-defense is strong evidence that that is how the founding generation conceived of the right.