Troy tritium sights - Troy Dioptic Apeture DOA Top Mounted Deployable Iron Sight for AR-15

I've got to tell you, I was extremely skeptical that Troy tritium sights would be measureably different from other sights on the market, but they're incredible. The all metal sights are made of top quality materials, superb construction, and function flawlessly. They're pricy, but you definitely get what you pay for. If your life might depend on the backup sights you run, then you only have one choice - TROY!