A good gunsmith can adapt anything to anything.

But, why would you want to put adjustable sights on a close-range-defense gun?

I suggest to you that the sights that are already on the pistol are quite adjustable enough for concealed-carry purposes.
(They adjust with a mallet and non-metallic punch.)

Might it be that you find yourself shooting low and left?
If that's true, it's not a sight problem. It's a technique problem.

I have fiber optic sites for my PT140 that I bought at Brownells, they rock. I'm to lazy to look for a link right now.

Watch out for those fiber-optic sights, ozzy.
Back when I was still testing new shooting products, my guys and I found them to be rather fragile. They would "go South" at unpredictable and inconvenient moments.

Maybe the light-pipe formula has changed, and they've become sturdier. But I doubt it: Acrylic gets sun-struck, which makes it brittle. Then it cracks.