Just because the light's not perfect doesn't mean your aim shouldn't be. The Troy Industries Tritium BattleSights are designed for twilight or any low light situation. Tritium is a form of hydrogen that emits a continuous light source where using batteries or electricity is not possible. The front post is starkly visible, to allow proper alignment, eliminating the poor sight orientation that's typical in twilight.

Specifications and Features:
Same plane rail systems only
Steel
Black
Tritium illuminated
Picatinny rail attachment
Folding