I was looking at my Sar 5's and noticed that one of the my non users had a sort of different coloured Handle pins.. All my other SAR's and GW's have a sort of shiny coloured pins exccept for the one SAR it sort of looks like its a brassy green colour.. Is this normal? and does anyone else have the same thing?? I figured it as just oxidation but all my knives are stored together so that can't be the issue