I don't "remember" them but was in the Army in the mid eighties, and one day I and a few others were assigned to clean out an office that had a bunch of old printed stuff like that in it. We were supposed to just pitch it, but were told if we wanted to keep any of it for ourselves we could. Among the cartoons was that one you have a photo of, how to field strip the M16. We never saw or read anything like that in basic (1984) but then it wouldn't have been politically correct then anyway, since there were a lot of female recruits.
My mother in law was a professional technical writer. She wrote and re-wrote some of these. The first time it was a 5th grade level, the second time at 3rd grade level. It was kind of funny that a 50 year old schoolmarm was writing this stuff.