Trijicon Glock 42 HD Night Sight Set Yellow Front Outline
http://www.amazon.com/gp/product/B00K8O2NUS?tag=sukses2015-20
Trijicon HD Night Sights
Fits Glock Model 42
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