Im looking at getting a boyds stock for the 300 win mag and it is a savage 111 300 win mag. my question is when I order the stock which model do I want to get? Is this particular model a detachable blind mag centerfeed or is it a blind mag centerfeed? It has the clip in the stock but it is not detachable, it is more like a detachable box mag that is hidden and opens up by the click of the blind magazine.