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Offset Folding Backup Sights Kit (Right)

FAB Defense

  • Offset Folding Backup Sights Kit (Right)
  • Item description
  • Weapon compatibility list
  • Manufacturer information
  • FAB Defense - FRBS Offset Back-Up Sights Kit (Right) - FRBS T (Tan)

    • The FRBS Offset Kit was designed as a back-up sighting solution for use in conjunction with magnification lenses during CQB scenarios or for IPSC disciplines.
    • The FRBS Offset Kit is an advanced, dual aperture, durable and low-profile auxiliary sights kit.
    • No tools needed for a quick and easy elevation and wind adjustment
    • RBS – Rear Back-up sight can be manually adjusted for windage
    • FBS – Front Back-up sight can be manually adjusted for elevation
    • Available in both right and left side variations
    • FRBS is readily mounted on any 1913 Picatinny rail, making it ideal for use on M4 / AR-15 / M-16 platforms


    • Dual apertures are 3mm for longer eye relief mounting, low light, and faster target acquisition and 1.5mm for shorter eye relief mounting and greater accuracy each is instantly selectable to match conditions
    • Low folded profile is smooth and inconspicuous, and will not snag on gear, webbing, or brush
    • Sleek design with minimal protruding parts
    • Instant spring-locked deployment mechanism will not slip, break or deform
    • Made of durable fiberglass reinforced polymer and metal construction

    Suitable for:

    • All 1913 Picatinny rails

    The FRBS Offset Folding Backup Sights Kit Right includes:

    • RBS - Rear Offset Back-up sight (right)
    • FBS - Front Offset Back-up sight (right)


    • Colour: Tan
    • Offset direction: Right
    • Material: Durable fiberglass reinforced polymer and metal construction
    • Weight: 59 g
    • Width: 57 mm
    • Height: 26 mm
    • Length: 51 mm
    • Width (open / deployed): 68 mm
    • Height (open / deployed): 44 mm
    • Length (open / deployed): 23 mm

  • Please note! The offered accessory product fits according to our knowledge on the following weapon models.

    Please also note the exceptions in the item description under “Not suitable for”.

    This information is without guarantee. For further questions you can contact our expert team from Mo.-Fr. 9:00 – 17:00 under the following phone number +49 (0)2206 9519 440.

  • FAB Defense

    FAB Defense

    FAB-Defense® is a registered trademark of FAB Manufacturing & Import of Industrial Equipment Ltd. Fab Defense in Israel.
    FAB-Defense® is mostly common for their various accessories for all kinds of rifles and pistols. Since its inception, FAB-Defense® has been leading in development and manufacture of the highest quality, cutting-edge tactical equipment and weapon accessories for the State of Israel’s Military and Police.
    FAB-Defense® works worldwide together with Special Forces and SWAT teams to develop creative, ability enhancing and practical solutions for the Law Enforcement sector. Operational field trials are essential for the tactical accessory development and have a considerable influence on the production standards.

    Some of the best-known products are the KPOS-Scout, KPOS- G2, T-Pod G2 bipod, PTK and VTS grips as well as all the different rail systems, buttstocks and grips for rifles and shotguns.

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