Certainly, I could be wrong, but that looks like the stock I have for an old "J" action. I don't know if the same stock was made for the standard size action, but if that one is for a "J", it won't fit the current models. In case you are unfamiliar with the "J" action, it was the early solid bottom target action. It was/is longer than the current model short action and shorter than the long action.
Rick