IIRC the modern push for gun control began even earlier in 1963, following the JFK assassination. I was 15 & Lyndon Johnson was already railing against “mail order murder”.
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.