I ask as there are two types. The first that was imported which was military grade and then the second which was for civilian use.
Be aware that both types develope cracks in use.
The first type can only be found on various AK boards and other sites that have large For Sale sections, like ARFCOM. The second can usually be found in sporadic lots of imports being released. These are becoming fewer as their reputation goes down.
Unfortunately both the Bulgarians and the Poles are now sending in poly mags of lower quality that depend on the rep of earlier higher quality mags. The only ones worth their reputation of dependability are the Bulgarian Circle 10 Waffles.