So far @textfiles has traced that quote back to '65, give him another hour or so and I fully expect him to come up with a fragment from the dead sea scrolls or some fragment in Linear-A hewn into a rock.
(TIL AK-47s are simpler than our assault rifles. Decent times: разборка, 8s, сборка, 15s, both, 30s)
Googling the last bit took me to a reddit post in a socialism subreddit that questioned whether people actually said that so there's that sidemusement as well.
https://twitter.com/textfiles/status/1300882097150795779
You won't find any references to the Kalashnikov prior to 1948 ;)