This is what I have on mine.
TruGlo Tritium & Fiber Optic Night Sights
Big Dot Tritium Front,24/7 Tritium Rear
Glock factory installed Trijicons
I like the TruGlo sights the best due to them looking the same day or night unlike the Trijicons white in the daylight green at night.
Damn you Pokey!!

Oh I will be following you in buying one for my Glocks.

What color green or red? This sight seems a bit better then the Xs Big Dot sights.
PS. Thank you, Pokey for the recommendation of TAS Pistol Sights.