The Mepro FUBS is a tritium-enhanced set of sights four 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 the shooter with secondary sights if the primary optics go down. The advanced Mepro FUBS sights are low-profile, made of strong composite material, and are highly durable. Quickly and easily flip them into position when needed. Sight pin elevation is easily adjusted without tools. You can also use it as primary sight. The Mepro FUBS sights are mounted to any Picatinny rail using a 2.5mm Hex key (provided). The detent knob on the rear easily adjusts windage, and the front sight includes an Indexed, easy-to-adjust Elevation Drum. No tools are required for zeroing.
Specifications:

Type
Frame Material	Polymer/Metal
Frame Color	Black
Firearm Fit	AR-15
Base Configuration	Picatinny Rail
Style	Flip Up Back Up Sight
Front Material	Tritium
Rear Material	Tritium
Front Color	Orange Tritium
Rear Color	Green Tritium
Rail Size
Windage Adjustment	0.43 MOA
Elevation Adjustment	0.26 MOA
Fiber Diameter
Firearm Type	AR Platform