FGC9-MKI UNW HYBRID Upper set

this could be a option to make a upgrade on your MK-I for a more cleaner look. do keep in mind that the rail pattern is not alined. since the rail of the MK-II is different from the MK-I if you don't like that then you could modify it a bit to make it work with the UNW long rail set for the FGC9 (MKI)

Update
after some thinking did made more sense to also include the MKI rails uppers
the buffer tube rails are longer and go a bit over the buffer tube part for a cleaner look

I have added the ND models this have a shorter charging handle opening since in my opinion it doesn’t need it.