Get on Amazon : http://www.amazon.com/gp/product/B00IUB0PAG?tag=lottalatte-20

Walther Trijicon P99/PPQ HD Night Sight Set Orange

Trijicon HD Night Sights
Fits the Walther P99PPQ
Tritium-filled glass lamp provides superior illumination in no light or low light conditions
Green lamps are warranted for 12 years from the date of manufacture
Professional installation recommended :