MEPROLIGHT FRBS flip-up tritium back-up sights

The MEPROLIGHT FRBS flip-up tritium back-up sights are self-illuminated front and rear backup sights designed to provide a reliable secondary aiming solution if primary optics fail. They use premium Swiss-made tritium vials for visible glow in low-light conditions, paired with an extremely bright day ring for daytime contrast. Constructed from reinforced polymer and metal components, the sights feature quick flip-up deployment, a spring-locked mechanism, tool-free elevation on the sight pin, and positive-detent windage adjustment. The FRBS mounts to a Picatinny rail and includes night sight capability, with a 12-year guarantee for tritium illumination.

• 12-year guarantee for tritium illumination.
• ALWAYS ON: Premium grade green Swiss made Tritium vials on the front and rear sights allow for lowlight and nighttime conditions. No batteries, no switches – always on always ready 24/7 for 12 years. The nighttime illumination is designed bright enough to see them but not too bright to impact sight picture.
• HYPER-BRIGHT FRONT: The MEPRO FRBS Hyper-Bright fixed Day and Night front Sight offer the most reliable illumination for day or night. Mepro Hyper-Bright front feature an extremely bright fluorescent contrast orange colored ring during daytime.The tritium source appear green on lowlight and nighttime.
• HIGH DURABILITY: The advanced Mepro FRBS sights are made of strong high grade polymer and metal parts, and are highly durable. Quickly and easily flip them into position when needed. Maintenance free, can be mounted directly with no modifications using 2.5mm Hex key (provided). Instant spring-locked deployment mechanism will not slip, break or deform. Sight pin elevation is easily adjusted without tools and the windage adjustment, with positive detent locking, not require tools as well.
• The Mepro FRBS is an advanced, dual aperture, durable and low-profile auxiliary tritium-enhanced set of backup sights. 4 tritium vials are firmly inserted in the rear sight, and one tritium vial is inserted in the front sight. In addition, the Mepro FRBS self-illuminated backup sights are designed to provide you with secondary sights if the primary optics go down. You can also use it as primary sights.