If you want a FO front, I would suggest starting with the .245" height (Brownell's part number 662-000-030). Don't be mad at me if you still can't adjust to a good POI, but that's my best guess having had both the Novak front and rear sights and a 1086 and 1006 in hand at the same time. I think the only thing that technically doesn't fit is the rear sight do to the clearance cut in the slide which can be easily fixed. The dovetail is supposedly the same. For what its worth, the Novak "label" in the bag with my front sight lists heights of .193, .204, .217, .224, .237, .245, and .275. Which of these heights are available with wich type of sight (Plain Black, White Dot, Fiber Optic, Night Sight, or Gold Bead) is something I do not know. I can't imagine there are not enough options to make the adjustable rear work. Hope that helps.