Manufacturer: AmeriGlo GL-126
If for some reason you are no longer shooting effectively with the standard post and notch sights you may see improvement by switching to the AmeriGlo Ghost Ring Sighting System. Many individual shooters and several police teams use the AmeriGlo ghost ring sight system.
Specifications and features:
Glock ghost ring night sight set
Green front and rear tritium dots
Made in the USA
Tritium lamp warranted for 12 years
Fits Glock 20, 21, 29, 30, 31, 32, and 36