That's not true. They're the exact same thickness; both are 0.028".
IMO, the only advantage the surplus mags have over the Bulgarians is the design of the feed lip. Otherwise, the two are almost identical.
Just going off the info here:
http://www.theakforu...hp?f=9&t=147546
and here:
http://www.theakforu...hp?f=9&t=135787
Ill buy one and test the thickness myself while posting pictures, that way we can avoid confusion.
I just measured both with a set of digital calipers. Also, the Bulgarians also seem to have stronger feed pressure (probably because the spring