Look for a walnut, many of the beech stocks are stained to look like a walnut. Oak is not a prefered wood for gun stocks, the oak stain will be fine, but real oak isn't used because it reacts with the bluing. Common gunstock woods are beech, walnut, maple, and ebony accents. There's a few others that some custom gunstock makers use, but I would say those are the most common hard woods. Of course there is also the laminates, which I believe are usually birch or fir....by the time they have the colors and laminations done they are more plastic than wood. Then of course there are the exotics like cocobolo and bubinga, but don't see many full stocks made out of that stuff(too expensive and hard to get stock blank sizes).
Ok, I went off on a tangent there. What I meant to say is "cool hamster!", I may make one for my B26:)