If you have to have the best, then get the HK steel mags. They are accepted as the top of the line magazines, and the price shows, going for 50+ per magazine. Your normal USGI mags will do fine and they won't break the bank either.
AIM Surplus has them in stock for $9.95 each.EricCartmann said:
+1 AIM are some good people also.jdavionic said:AIM Surplus has them in stock for $9.95 each.