Krag-Jorgensen model 1898
This rifle appears to be a Springfield Armory, model 1898 Krag-Jorgensen rifle, which I believe is chambered in .30-40 Krag.
To the best of my knowledge, this rifle appears to be a "carbine cut down" that has likely been sporterized. I have been told by a friend who enjoys these rifles that the front sight is from a 1903 Springfield, which is typical of cut-down rifles. The leather sling may be something special as well, but I see no maker's mark on it.
The bore appears good and the action is smooth. The rifle has a magazine that is an attached box on the side. Cartridges are dropped into the box and the gate is closed. The rifle, I believe, holds 5 rounds. I have a limited knowledge base, but I believe that the hand-grip piece of wood has been added to the stock. Despite not being in original condition, this will make a neat shooter and/or collector piece.