I did read in the article something to the effect of, "It does NOT make your rifle somehow "illegal" for having an M16 part in the rifle. That is a myth.", but, as I said, I'm still "getting into" the AR world & have some learning to do..wanted to make sure that the carrier wasn't what made it FA. I'm sure you're all aware of the article of which I speak, but just in case, here's the link:
http://forums.officer.com/showthread.php?t=81462
I considered it to be an excellent, well-written article & I, personally, learned a lot from it.
J