They are called "slave screws" from T/C and come in either ss or blue. I could not find them in any T/C dealers around my area but found them in a small ML shop in my friend's area. I do not see my front sight anymore but when my 1-4x is turned to 2 power or less I still can see the ss barrel. I have the high mounts and I realize I should have bought the see thru mounts. My scopes are set fairly far back and that is the reason why I probably should have opted for the see thru mounts.