i have complete bcg that came out of my new no-ban bushmaster rifles that were bought complete and they have the "enhanced" carrier similar to my rra and cmt carriers
i have a few factory complete bushmaster rifles and some have it and some dont and to honestly tell you i could take them all out and wouldnt know which came from which other than enhanced and not.
i have noticed that the non-enhanced ones are from older post-ban rifles and the newer no-ban has the enhanced.
but hey if you want the non-enhanced carrier for your enhanced one then i would trade you.
mine came directly out of my bm rifle but it is used and i would like to keep my bolt and you keep yours.