I've played the game until the end and I still can't make a bowgun i only found two 2 part of bowgun one in first forest and one in savannah i guess there are 3 parts that need to be found to assemble the bowgun.
if anyone knows where the last piece is, please tell me, or if not want to make it too easy, just give me some clue.
(To the developers)
I just bought this game yesterday and I really like it, it's one of the best games I've played.