Meprolight FBUS Self-Illuminated Folding Back-Up Night Sights
Self Illuminated Backup Optics. Tritium Enhanced Set Of Sights. The Mepro FUBS is a tritium-enhanced set of sights - two tritium vials are firmly inserted in the rear sight, and one tritium vial is inserted in the front sight. In addition, the self-illuminated backup sights are designed to provide t
