Good examples of pubic knowledge, obviously what is myth and what is fact has a 10 to 1 ratio against it.
It's ARmalite, and NOTHING else is right. It was on the mag well of the first production run issued to the military, entirely and exclusively the trademarked property of Armalite, Inc.
The term "assault weapon" wasn't used until 25 years after the invention of the M16, and "assault rifle" was pretty much a military historians version of "sturmgewehr," a literal translation of the original German invention of the 1940's. It simply described a class of intermediate caliber rifles with large capacity magazines and full auto fire.
Since the contrived Rangel vote in 1984, there's an administrative block on allowing sales of new full autos. Therefore, during the era of the biggest push to criminalize them, they were already only legal to own under NFA rules, by a specially licensed dealer, and each transaction individually cleared by the BATF after months of bureaucratic paperwork. Just like today. Ahh, the irony.
Don't be so quick to accept the newsmedia's parroting of the antigunners phraseology. It's the biggest weapon they can use, words have meanings, and using the wrong words just gives them the edge.