Beware troy does not guarantee the tritium after they turn dark - Troy Dioptic Apeture DOA Top Mounted Deployable Iron Sight for AR-15

These are not inexpensive sights with the tritium front and back (dioptic that I have) going dark after 7 years. I called Troy fulling expecting to have these warrantied under their limited lifetime warranty. Nope not even any empathy from them. They said 'everyone' knows that Tritium goes dark after about 10 years and if you want to replace the parts containing the tritium, you must buy the entire site, again, at retail. They were kind enough to offer me a 10% discount if I bought another set; are they kidding? My future experience with Troy is over and I will NEVER buy anything from them again. The sights are rugged which why they got 2 stars from me but any company that doesn't stand behind a lifetime warranty these days is bought to eventually fail. I guess they don't care about their retail market. Btw, XS sights will replace your sights if the tritium fails, under their no questions lifetime warranty and are a pleasure to deal with. I had such an instance with them and can't say enough about how pleasant dealing with them was.