It could be that the staining problem alluded to above is the FN habit of fitting stocks and forends from blanks with very different grain, color cast, possibly variety and then glazing them heavily to get a match. I think that's a real possibility on a grade 1 but not on a Diana grade. Should be crotch black walnut on the back and a decent piece of same in the front in which case it should match up fine under oil or alkanet and oil.

jack