Cdnn has them for less than $9 a mag, any issues with them or know why they changed them?

The CMMG mags I've continued to use are gray-body with green tall followers and those work absolutely fine. Just a touch hard to load without a loader.

Even though I've got plenty of the CMMG mags, I've switched entirely to the 15-22 magazines, since they work every bit as reliably, are easier to load, and activate last round bolt hold-open with the redi-mag adapter.

None of the newer designs or generations of CMMG magazines ever really caught on, or in my experience, worked very well. Stick with the first gen CMMG, M&P15-22, BDM or original Ciener steel magazines.