MEPROLIGHT Mepro FRBS Folding Back-up Sight Set

MEPROLIGHT Mepro FRBS Folding Back-up Sight Set.

The FRBS are tritium-enhanced, self-illuminated front and rear back-up sights designed to provide secondary sights in case the primary optics go down. FRBS sights are advanced, low-profile, durable folding backup sights. They fold up and down as needed and are readily mounted on any MIL-STD 1913 Picatinny rail. Day or night, the tritium luminance provides a reliable aiming solution. Can be used as a primary or back-up sight. Manually adjustable, no tools needed. Compatible with MIL-STD 1913 Picatinny rails. 12 years warranty for night luminance.