I can not find a pic of the Mattel Stamp.
I know guys at www.ar15.com who’ve photoshopped the Mattel logo on the aluminum receiver.
I wouldn’t be surprised if somebody hasn’t had their receiver etched with that logo.
My first M-16 (Army Basic Training, 1985) was a GM Hydramatic. I was seriuosly confused, until I saw the 5x scale M-16 hanging next to a 4’ claymore on the wall. Then I was really messed up.