Krag-Jorgensen is a specific type of bolt-action rifle that was invented in Norway. Sometimes, people may use the term in reference to any type of old-fashioned, military-style firearm. If you're looking for synonyms for Krag-Jorgensen, you might consider using the terms bolt-action, Mauser, or Enfield. Another similar term would be sniper rifle, which refers to any high-powered firearm used for long-range shooting with great accuracy. Additionally, military surplus rifles may resonate well with people who are interested in this type of weaponry, and can refer to many different types of rifles used by various countries around the world.