I do not get the serial number problem with a tang mount peep sight like the Lyman # 2 on my model 94?
Afraid of a stolen gun not having the serial number exposed? Pawn Shops never worry about the serial number till they have to do the selling paper work.
My friend found his stolen guns at a pawn shop. He did have the serial number list when he got the cops to go back but with the removal of the butt plats there was his name drivers license number and address on a plastic tape.

Al