u/Background-East210

I won this auction lot, and I’d like to know what I won. I bid at first thinking they were ar-18 mags, and I lowbid thinking I’d lose, but if I didn’t I’d have some cool mags. I’ve been doing research, and from what I can tell these have a cutout for both ar-18, and ar-15. They look similar to USA mags, but the bottom hole is too low for that. I’ve found examples of sterling mags with the same holes, but they lack the ar-15 cutout, and I’ve found examples with the ar-15 cutout, but no bottom hole. I’m happy I won, because of how cheap, regardless of what these are, but I hope somebody can help me.