'Old Arms of Idaho' - Welcome to the KCA Forum.

Your Krag looks to be a parts gun put together by party unknown. Your wood and metal appears refinished.

The only model 1899 carbine part is the sight-protecting hand-guard, (which could be a reproduction part). Your model 1901 rear-sight is a rifle sight.

A close and clear picture of your front-sight base might help reveal if your barrel is a real carbine barrel. Krag carbine barrels measure exactly 22 inches from muzzle to closed bolt-face.

I cannot read the worn serial number on your receiver. It appears to be in the 78XXX range. There are a lot of model 1896 cavalry carbines and some rifles in that range. It is possible you have a model 1896 cavalry carbine that someone has 'blued' and put in an incorrect & cut-down stock.