You're making me guess what firearm needs these adjustable night sights. But the factory sights on my Dan Wesson Silverback are adjustable, tritium dot - so we'll start with those.
I don't like 3 dot sights - I'd opt for a tritium front sight (I like Ameriglo's thin front sight) with a serrated, black out rear sight. You might spend a tad more for such a combination, but you can get a rear sight to work with pretty much whatever height front sight you want that way.