The Zastava M98/48 (often called Mod.98/48, Model. 98/48, Yugo K98) was a refurbished bolt action rifle, chambered for the 7.92×57mm Mauser cartridge that was temporary adopted in the years after WWII by the Yugoslav People's Army.
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Actually, these rifles are Karabiner 98k that were left overy by German or captured by the Liberation Army.