I just posted a reply on the other thread "SA-80 Problems" and noted that the black teflon finish new in sealed plastic with green followers with Imperial Defense Services on the floorplate that I bought from Lauer work so perfectly that I shoot them exclusively in IPSC rifle. I see the DSA also has the same mags for the same $20 each that I paid. I'd buy these mags again and again and again.
I agree with you, there are a lot of the grey parked mags out there and a few people are having trouble with them. One guy on the post I mentioned has a theory that the grey's w/o floorplate markings are "rejects", urban ledgend? I don't know, but what I do know is for the few extra bucks the black teflon mags work perfectly and LOOK totally cool on my evil BLACK rifle!
Bill