I don't know much about old military rifles, this one included. Not really sure if it's a K or not but it does say it's a model 98, and the barrel and receiver have matched serial #s. There's a crazy looking symbol then UX before the 98. I'm not even sure what stock to buy but if I an going to shoot it ill need to get one. The one on it was held together with a screw and a radiator hose clamp. Thing looked like it had been shot right behind the receiver. I'll keep the current stock just in case that is an old war injury.