Jason - Welcome to the KCAForum.

It sounds like you have a Norwegian model 1894 infantry rifle, that was manufactured at the Kongsberg Arms Factory in 1916. (There should be a stylized "K" and Crown, near the date).

Unless your Uncle was a Norwegian soldier, it is not likely he had this arm during WW2.

The Norwegian Krag-Jorgensen rifles and carbines are very popular with U.S. collectors. You should post some pictures, under the 'European Krag' heading.