I remember that stuff. Specifically, in basic training, having to present my M16 in such a manner that the ejection port was facing up, with the dist-cover open so the Drill Sergeant could POUR as much of that stuff into the action as would go until it ran over. We had to hold our M16s like that to let that stuff ooze down around the bolt before we locked the bolt back and tromped onto the firing line to qualify.
Never understood what that was doing for us, as these M16s were rattle-traps that reminded me of a cartoon jalopy convulsing down a dirt road. Loose as a goose, I guess you'd say.
81 or 82, we got Break-Free, CLP and that ORIGINAL stuff was the berries. Cleaned M16s, M203s, 1911s, 4.2" mortars, M60s and M2 BMGs with that stuff and it worked much better cleaning carbon. I get a nostalgic tingle when I smell the stuff and still have about a quarter of an ounce I save just for a whiff once in a while.