Well, from what I can see...  it looks like you have an 1898 rifle that has been cutdown to carbine dimensions.  The stock is definitely a shortened rifle stock.  The front sight blade is not a Krag blade, and the sight post was most likely re-installed after the barrel was shortened to 22".  It almost looks like it's installed with JB Weld in the one picture.  It should still prove to be a good shooter, and fun rifle to hunt with!