Meprolight MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights 2 Dot Rear / 1 Dot Front Black. Mepro 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. Mepro FUBS sights are readily mounted on any 1913 Picatinny rail. Day or night the tritium makes the Mepro FUBS a viable option. Specifications for Meprolight MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights: Manufacturer: Meprolight Front Sight Color: Green Rear Sight Color: Green Gun Model: Universal Color: Black Fabric/Material: Polymer Fiberglass Attachment Type: Picatinny Condition: New Illumination Type: Tritium Gun Type: Rifle Mount Type: Picatinny Features of Meprolight MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights Low profile and lightweight design. Can be used as a primary or back-up sight Manually adjustable no tools needed Durable fiberglass reinforced polymer and metal construction Spring-based locking mechanism will not break or deform Compatible with all MIL-STD 1913 Picatinny rails 12 years warranty for Night Sight luminance Package Contents: Meprolight MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights N What firearm models does the manufacturer say Meprolight MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights is compatible with? The manufacturer says that Meprolight MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights is compatible with UniversalMeprolight 404100: MEPRO FUBS - Self-Illuminated Folding Back-Up Rifle Sights 2 Dot Rear / 1 Dot Front Black