I posted this on the Walther Forum but got no response.  I figured I would try here.

I purchased a PPS 9mm about a month ago. It is quickly turning into my favorite carry weapon (MTAC holster). I would like to upgrade to night sights and was looking for recommendations from you all. My one concern is that the pistol shoots dead on for me. I hesitate to do anything with the sights and risk losing that type of accuracy.

One other question for PPS owners; How many mags do you all have?

Thanks!

I just had night sights put on (Mepro I believe).  Still shoots dead on  I was a little nervous also that they wouldn't get them on just right, but they are perfect.
I have one 6, one 7 and two 8 round mags (4 total).  Keep the 6 in for CCW with an 8 for backup.  May get some more 8's as it prefer them for the range (better grip and more rounds).
LOVE my PPS

I don't have night sights, but I'm rocking 5 mags with 3200 rounds through them.  You get good at reloads quick!  

XS big dots are available for the PPS.

 

I like the Mepro's they are bright and I saw no change in accuracy on my PPS.

Mags I have 4
1 - 6rd
1 - 7rd
2 - 8rd

Currently I have to carry over the waistband and have no holster for my PPS (previous injury that prevents IWB carry) but I use a Comp-tac Minotaur also.