Total junk guys. I got a bunch of them, and at first one or 2 gave us issues. After shooting them a good bit- EVERY single one fails to regularly feed rounds #6,7,8. It will feed just fine number 1-5. Then, after you manipulate the darn thing, it will eventually load and feed #9 and 10.

STANAG mags or Magpuls.
Hamlund Tactical, 30 rnd Magpuls for like $13 ea if you buy 10 of them. I am in Ca, so they send out the repair kits and we can install blocks to limit them to 10 rounds.
Magpuls are stupid-good. Just about flawless. To hell with the Thermold mags.

On a side note; my friend has a RRA 308 FAL. He likes the Thermold mags for that rifle pretty well, said they are more reliable than his FAL mags.
I dunno. What I DO know is, they are not good for ar15's.