Yesterday I was cleaning my mags. I had taken them apart (my 16 rounders, 15 round Turkish mag and my 10 rounder) when I decided to experiment a little. First, I switched the 16 rd LE mag spring and the Turkish mag spring. It came as no suprise that they both worked in the other mag body. But then I put the 10 round mag spring in the Turkish mag and it held 16 rounds! I was shocked however I haven't taken it to the range yet to see if it works (I doubt it will though) just thought it was kind of strange.