Thanks to those who provided idea's and info on this pistol, from what I have measure with calipers the rear sight dovetail is the same as a Mk3 slide, which by s/n it is a Mk3. The front sight is brazed on and would require heat to remove and a slide refinish according to Novak's customer service, plus is it sit higher than a normal front sight and would have a tendency to shoot very low with just swapping out the rear sights. I'm not a big fan of the blueing on these pistols as they wear quite fast with use. Cerokote is a option I'm currently looking at and I see they have a black that is quite similar to the factory black finish found on standard Mk3's.