As 45ACPKing already stated, these NM rear sights came with either an (unhooded) peep aperture or a hooded aperture.
Either type I would think SHOULD use the same gear teeth on the NM pinion and also mated to the same pitch teeth on the ramp of either the bare peep or the hooded aperture. Either ought to give you the NM 1/2 MOA clicks/graduations for elevation, no?
Since this unit from Marstar is furnished as a complete NM rear sight assembly, I don't believe we have to worry about matching windage knobs and such, as it's already a done deal. Marstar says it IS a NM sight, so both windage and elevation should be 1/2 MOA adjustable, to qualify as a NM. At least that's what I'm banking on. ;-)
Cheers.