it was explained to me that the resemblance of a FNC to a AK47 was so great that "most" parts will either directly interchange or require only slight modification..
I noticed that the FNC sear was much cheaper than a F/A ak47, and wondered if i could make a sear gun out of an AK47...
However i have heard that just becaulse it fits, doesnt mean its legal, and i was looking to see a response that would specifically name the AK47 as a legal use for a FNC.