Original FN FNC mags NIW will cost twice as much as the HK AR-15 mags of today. I have some new in the wrap in my collection and I agree that they are great mags, but I would not part with them for less than $90-$100 each. That seems to be about the market price for them NIW. Used ones can be found some what cheaper. Not an easy item to locate, but they do pop up from time to time on Sturmgewehr. They are definitely preban, as all FN FNC rifles were imported before the AWB.