The fubs are tritium-enhanced, self-illuminated front and rear back-up sights designed to provide the shooter secondary sights in case the primary optics go down.Fubs sights are advanced, low-profile, durable, tritium-enhanced auxiliary front and rear back-up sights.The sights quickly fold up or down depending on the shooters needs.Sight pin elevation is easily and quickly adjusted without tools.Fubs sights are readily mounted on any 1913 picatinny rail.Frame Material: Polymer/MetalFrame Color: BlackFirearm Fit: AR-15Base Configuration: Picatinny RailStyle: Flip UpFront Material: TritiumRear Material: TritiumFront Color: OrangeElevation Adjustment: YesFirearm Type: AR-Platform