I've been searching for a couple of weeks now for an original sight base without luck (it almost happened, but that's another story!).  I've decided to take the advice of a couple of you here and go with the repro from S&S, which I ordered.  Since it's in the white, I'm wondering what others have done as far as bluing it.  I ran across a reference online that these were originally oil quenched and was thinking about trying that.  I've never blued a gun part in my life but think that any modern bluing is likely going to look too blue.  Any experience others have had with this that worked well and ended up blending reasonably with the existent aged bluing of the Krag barrel?