I have 6 AK 74 mags that I want to trade for AK 47 mags. They display moderate to heavy wear, all function well. I believe they are Bulgarian. 5 are circle 21, 1 is circle 10. I am looking for a straight swap for like AK 47 mags (7.62 x 39). I will consider any difference in quantities relative to condition of your mags.