I just bought a used glock 19 and it came with these on it, but i have replaced them with something different. They are warren tactical sights, front is a night sight with tritium, the rear is standard non tritium. I do not know how old they are but the tritium is very bright, i would say like new. There are some tiny marks on the right side of the rear. SPF warren tactical sights | Flickr - Photo Sharing!