Meprolight combat proven tritium powered nightlights allow you to quickly see and use your sights in low-light conditions, a major upgrade to standard BUIS (Back-Up Iron Sights). While being perfect to back-up to an optic, this sights are rugged enough to stand alone and may be preferable in some conditions such as moving from a air conditioned house in to a very warm and humid environment where condensation quickly fogs over even the best optics.

The FRBS are low-profile in the stowed position, durable, and quick to reply or stow as required.