i am not affiliated with this seller other than 3 of us are going together on a group buy so we each have some vintage mags to go with our retro builds at a reasonable price and to spread out the shipping cost.
He doesn't list any Mattel mags, but then I already got my 2 Mattel mags from Sawman's stash. m16
https://www.ar15.com/forums/Equipment-Exchange/WTS-USGI-Pre-Ban-20rd-Adventure-Line-and-Simmonds-Universal-Magazines-NEW-OLD-STOCK-retro/24-1746436/
He doesn't list any Mattel mags, but then I already got my 2 Mattel mags from Sawman's stash. m16
https://www.ar15.com/forums/Equipment-Exchange/WTS-USGI-Pre-Ban-20rd-Adventure-Line-and-Simmonds-Universal-Magazines-NEW-OLD-STOCK-retro/24-1746436/