Yes. 1963 was the start of demands for registration of all guns and a ban on 5 shot bolt action army surplus rifles but it didn’t take off till 1968 with the murder of Bobby Kennedy coming so soon on the heels of the Martin Luther King.
I still remember both Sears & Monkey Wards for fall 1963 offered surplus Argentine Mausers, French MAS 36s & some others for under $30.
I was 15 & broke. But Dad brought me a M1903A3 Springfield that the local college ROTC was giving away. That Christmas he gave me a Remington 870 which I still have.
By 1968 it was “you can keep your long guns, we just want to ban handguns. At least a national registry & licensing of owners, is that too much to ask?”