Just saw a Siamese Mauser at my local gun shop today. Its late but i never heard of this one or don't remember it in the book but will look it up this week end. The thing I saw on it was a cover over the mag exit that you can slide forward so the casing can fly out. What is the purpose of this and is it only on these Mausers, can it be removed, should it be removed,or is this an addition and not correct to the rifle? I think I'm typing in my sleeeepp.......