I changed mine on my P99c. I think I put on the #3.
Any P99 owners ever have to change the front sight from the stock #4?
My P99s hit fine with the already installed #4 (I did have to adjust the rear sight on my fullsize just a little), but I did have to change the front sight to the #3 on my SW99. It hit a little bit low when I first got it. Still have the #3 on it.
I changed mine on my P99c. I think I put on the #3.
I switched to #3 on my QA.
I put Mepro night sights on mine.
Never had to change the front sight, I am dead on with the #4. That is for those that still have the plastic sights. Soon all of mine with have Meps.