I didn’t say anything about Reagan. If you are saying “Fuck Reagan” then we don’t disagree about anything important so far as Reagan is concerned.
As for it not being a legal right in the USA that’s a straightforward fact. It was DC vs. Heller, a 2008 case where a Washington DC law was found to be unconstitutional which is the first case where such a law restricting access to handguns was found to be unconstitutional. There were plenty such laws prior to 2008 that survived legal challenges which is what proves the legal right to own a gun didn’t exist prior. But in 2008 the Supreme Court stated the law was unconstitutional at the federal level (DC being a federal district) establishing an individualized right to guns for the first time.
And it was in 2010 that this was extended to additionally restrict the law making power of states, in addition to the federal government, since by default the constitution is understood to restrict the federal government and not the states, but the poorly defined legal doctrine of “incorporation” basically says some bits are applied to restrict states as well.
In the sense of having an individualized legal right to own a gun, prior to 2008 it didn’t exist.
As for ruby ridge types saying shall not be infringed sure, I’m sure many of them advocated the maximalist interpretation way back when that the courts later adopted in 2008, but up until at least the late 90s the idea that weapons could be regulated wasn’t even controversial and the maximalist position could then be called mostly fringe and was only just beginning to emerge as a position a suit wearing serious legal professional would advocate. Bill Clinton banned a bunch of them in 1994 and no one really blinked an eye at the constitutionality of it and the federal assault weapon ban of 1994 survived legal challenges that it definitely would not have survived after 2008 and DC vs. Heller.
The NRA became a lot more activist in the 80s and 90s and really it was their activism that pushed the once-fringe idea that the constitution required largely unrestricted access to weapons into the mainstream.
Which requires editing out an entire sentence by calling it a prefatory clause, a preamble, which flies in the face of the fundamentals of constitutional interpretation which requires the assumption that each word was written for a reason.