You have a "sporter-ized" something.... It is a Mauser action, but tricked up. Try to find numbers off of items and see what you have. If the gun is sentimental, keep it clean and in the safe. If you spent a little money on it, take it out and shoot something. Enjoy it! Somebody put some money in the scroll work and having that sight mounted. BUT, take it to a real gunsmith and have them check it out first if you have any questions on its safety.
ktown,
Please be patient and wait for the opinion of a member with more post and knowledge of Mauser sporting rifles. Though I am more of a pistol collector I see no indication that this is a military rifle that was "sporterized". It in fact has more of an appearance of a rifle that has always been a commercial rifle.
JPat2033,
For a first post you are appearing to offer an expert opinion on something that I do not think can possibly be determined from a few images. If you care to explain how you reached this conclusion it would provide more weight to your statements. I do not see any military markings. I do see a set trigger a single blade rear sight, the engraving, scope mounts and stock design are that of a Mauser sporting rifle. There is no doubt that it is a 98 action but that does not rule out a commercial rifle. I know there are many very knowledgeable here on military Mauser rifles as I am sure there are some who know commercials ones. It seems to be the standard response to those who have what appear to be sporting rifles that they were converted, and many were created from military rifles but I do know that Mauser made many commercial rifles and so did other companies using Mauser actions that some people cannot tell from a expertly converted military rifle from an original commercial one.
Regards,