Looking to find out as much as I can about a rifle I was just given( it used to be my grandfather's , so there's no way Ill sell it ). There is no designation on the rifle, but it is a semi-auto, bottom ejection, holds 11 round in the butt-stock. It's serial # is 2t45918. The bluing is in pristine condition, the stock has 1 bad ding in it. Any clues as to what I have(model,year,etc), as well as approx. value would be greatly appreciated.