Difference in blued and parked GG mags?

[timspawn]

I have noticed that only blued GG mags will lock up in my Vector GG lower. The parked mags seem to be too thick on the back end, right at the top. Anybody else experience this?

 

[Mr.Burns]

No, all my mags work fine. I have Chinees, Israli, etc... All good.

 

[Cortland]

All of my GG magazines are blued, and they all had the problem you describe. I had to grind down the back of them so that they would clear the base of the ejector which stuck out into the magazine opening ever so slightly. They all work fine now.