African Stabbing Spear or Someone's Garage Project ?

[drac2k]

I just acquired this item at auction. The shaft and the heavy head I believe to be authentic as I do the spearhead, however, I'm pretty sure(but not positive), that they don't' belong together. The only reason why I'm not absolutely sure that this is not a fantasy piece is that I was unable to separate the spearhead from the shaft (using reasonable force), and the fact that the tapered shaft that goes into the spearhead doesn't look to have been freshly whittled down;there is the same patina throughout.
If anyone can identify the club or the spearhead, I would appreciate it.