I agree that gun control has been a long term plot .
What I disagree with is your list of culprits .
A close study of political history since 1900 will show you the slow encroachment of communist/socialist subversion, not just in America, but the entire Western world.
They openly call themselves communists and Socialists in France , in England they call themselves "The Labour Party",
in America they are the Democrats, but if you pay attention you will note they all refer to themselves as "Progressives".
That has been used as a reference for communist/Socialist movements since at least the time (1840ish) that Marx was using it in his writings.