Hmm, I'll have to look at my manuals and see what they say. I can vaguely remember seeing that mentioned in the book. Maybe it has something to do with the sling studs in the stocks. Heavy loads, hard recoil, I could see repeated use could pull the stud out. Perhaps they've had lots of warranty claims on the stocks? Although I do think that Knight has the best factory stocks of any ML company (and some centerfire rifles too).
