Excepting the StG 44,"assault rifle" is a nickname, same as "grease gun" is for the M3/M3a1. Can you "wrap your head" around that?
Yes, but "assault rifle" went on to become popular and official vernacular. "Grease gun" did not go on to classify any sub-machine gun.
"Chicago typewriter" and "grease gun" are nicknames that didn't stick. "Tommy gun" did. "Mr. Woolworth's gun" didn't stick for the STEN gun. "Ma deuce" for the M2 did. "Assault rifle" and other nicknames aren't nomenclature.
You're confusing nicknames with type classification. The M3 and Thompson were sub-machine guns and the M2 a heavy machine gun; their nicknames are completely irrelevant.
At this point it feels like you're using troll logic to mess with me.
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