Wow Michael, it was awesome to open up this thread and see your first post, "I am new to this forum..."
I am sure that your collection and your knowledge base has come a long way in the past 8 years!
I must say that Museum description or not, something still does not seem quite Moro about these. Even though there is provenance of where it was collected, it still does not necessarily mean that is the place of origin. Anything is possible, but stylistically the fittings just don't seem Moro to me.
The Museum of Natural History is a wonderful place (i am originally from New York), but i have seen ethnographic weapons mislabeled there before. They may well be right this time, but i do take their judgement with a little grain of salt at times.