I bought the upper from Richie's Guns and Ammo. (Works out of his house.) But I heard someone at Knob Creek picked up a couple of Frankinmags from DPMS. He said they looked alot like the older G-Tek 7.62x39 mags.
There are some pictures here of the G-Tek and the USA Mags side by side.
Follow the links thru M-16 configurations........7.5" 7.62x39mm upper. The pics at the bottom of the page.
(Sorry the site doesnt allow direct linking, and I dont want to steal his picture.)
The G-Tek is on the left and the USA mag is on the bottom right.
I live in Houston City limits (ya guys there is a Houston Alaska). And am a member of the KGB or Knik Goose Bay Shooters Association. (Machine Gun Club). And on occasion have been known to shoot with the AMGA or Alaskan Machine Gunners Association. A great bunch of guys, the lot of them.
Thanks for the tip on the mags. If DPMS does not have them I will go over and rattle their cage at Turpin.