While the Krag-Jørgensen was developed by Ole Krag and Erik Jørgensen at the Norwegian government's Kongsberg arsenal, it was first adopted by Denmark in 1889. The rifle was first adopted by Norway in 1894, two years after the U.S. adoption.
Both the Danish and Norwegian versions utilize dual locking lugs (though asymetrical); why the U.S. Army made its version with a single locking lug and a non-bearing safety lug is not, as far as I know, known at this point in time.
Jim
|