Hi Congoblades, a very beautiful bow and arrows!!! No touristic stuff at all!!! I see on the book "Waffen aus Zentral Afrika" and i have attached a picture of an arrow that seems like yours: on the book is called Manyeme (see map). For the bow you can see on this site:
http://anthro.amnh.org/anthro.html
you can see many bows on the section
African Ethnographic Collection
and than digit the word bow. I think that is congolese for the way the cord (it's sinew?) is attached to the bow, but anyway take a look. Congratulations