mac i hateto pee on the parade but iam not sure i like that coating or maybe its the color, ? what is the purpose of it? rust ? toughness? i never seen it before , i really like how you set the rest up , love the stocks, i got an morgan or two layin around here use to use them on trap guns , for the money they proboly one of the best adjustable pads goin, yu can also glue leather or somethn like it on the one pad and then yu can adjust the cant also , so it fits right in your shoulde cup , ( little trick i would do on trap guns