jse has some 9mm ar-15 mags in stock for $21
they also have a very few UZI-45acp mags, and a few 7.62x39 10rd mags.
they have a bunch of HK-g36 mags.
if you have built a 9mm ar recently and need a few mags it is worth a look.
no word on 5.56 mags like c-prod/ASC or p-mags --yet.
they also have .50 uppers --make a hell of a super shorty SBR--LOL!