[@User]
Actually, first and foremost, the existence of bows in SAO. 
I have a source indicating that bows and arrows themselves did not exist in the original SAO, and are something that only appear in Alfheim Online's expansion version of Aincrad. 
So first of all, we have to discuss whether to have bows or not, which I am letting Caits decide, and then follow it up, if we do include bows, for things like range and things like that