Agree with the TFX Pro Day/Night with the Orange front. I use these on all guns.I replaced my PPS M2 sights with TruGlo TFX Pro sights and I just love them. I like them so much that I am replacing the sights on my Sig P365 with them and my wife wants me to replace the sights on her Sig P238 with them as well. They are fantastic sights.
TruGlo TFX Pro for Walther PPS M2