Corey:  You have a Model 1899 Krag Cavalry Carbine that has been slightly "sporterized".  It was probably produced in September 1901.  You have the 1898 Carbine rear sight on it which is relatively rare.  I believe this sight is not correct for the serial number range of your carbine.  Your stock is a Carbine stock but has been heavily sanded judging by the faintness of the for-end finger grooves.  The sling swivels appear to be commercial 'screw-ins'.  (I would remove them, plug the hole in the butt stock, and get an original unaltered carbine barrel-band to replace the present one that seems to have a hole drilled in it to accommodate the front swivel).  The 1899 Carbine did not have swivels.  Your front sight blade is a commercial one.  A replica Carbine blade is available from S&S Firearms in Glendale N.Y.  You have a lot of original Krag Carbine and it is worth restoring.  The 1899 is the most common of the U.S. Krag Carbines and not as valuable as the 1896 and 1898.  As is, I would estimate the value of your Carbine to be around $800 to $900.  Go to the main page of the KCA Website and 'click' on photos to see more info. and pictures of Krag models and carbines.