Yours are pinned, these are for the fixed sight airweights, S&W's most popular revolver. Many have wanted to upgrade the sights and this makes it an option...finally.Got one on my M&P 340, My 46 Year Old Eyes can see it day pr night without the Glasses. A BARGAIN!
They come standard on all the night guards. Magna Port can mill off your front sight if you don't have a pinned one and install it for $115. I had them do this on 3 of my Charter revos.Came standard on my .44 spc. Night Guard.