The Krag-Jorgensen was adopted by the United States military in 1892. Its distinctive feature was a magazine integral to the receiver that featured an opening on the right-hand side with a hinged cover. Single cartridges could be inserted through the side opening allowing the rifle to be loaded while the bolt was in a closed position. 

Although innovative, this design proved inferior to the more robust Mauser action. The United States replaced the Krag in the early 1900s with the Springfield M1903.

Origin:                                   Norway
Military Service:                         1892 - 1903
Wars:                                     Spanish-American War, Philippine-American War
Cartridge:                                .30-40 Krag
Action:                                   Bolt Action
Magazine:                                 5 Round Internal

Significance:               The rifle's unique magazine allowed it to be loaded without opening the bolt.  Used by Teddy Roosevelt and the Rough Riders during the Spanish-American War.