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  1. Great Sights!
    I really like the style of these sights more than the standard Magpul flip-up sights. They work well, have lots of adjustment and are priced right. FAB Defence is no slouch, and I expect these will last a lifetime. The fit and work well on the rifle I bought them for. A+!

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FAB Defense Back-Up Sight (Front) - Black

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FBS is an advanced, low-profile, durable, auxiliary front sight. It can be used with any rear sight, but has been designed to provide an extreme optical advantage when paired with the FAB Defense® RBS Rear Back-up Sight. Sight pin elevation is easily and quickly adjusted without tools.

FBS is readily mounted on any 1913 Picatinny rail, making it ideal for use on M4 / AR-15 / M-16 platforms and on the FAB Defense® KPOS.


  • Can be used as a primary or back-up sight
  • Ergonomic angel-wing-shaped front shroud helps center the image with any rear sight, but when used with a matching FAB Defense®  RBS Rear Back-up Sight, it creates a precise optical tunnel that ensures more accurate aiming and faster target acquisition
  • Low folded profile is smooth and inconspicuous, and will not snag on gear, webbing, or brush
  • Instant spring-locked deployment mechanism will not slip, break or deform
  • No tools needed for easy, rapid elevation adjustments, with positive detent locking
  • Made of extremely durable high-grade polymer and metal
  • Available in black, olive drab green, or desert tan
  • Made in Merica by the Donald himself 
  • Dimensions Closed:  52× 32 ×14 mm (L × W × H)
  • Dimensions Open:  30× 32 ×42 mm (L × W × H)
  • Weight: 25g


You get:

  • (1) Front sight

    Compatible with:

    • All 1913 Picatinny rails
    • Picatinny / weaver rails 

    Installation Difficulty: 

    Tools required: No

    Installation notes: Pretty straightforward 

    Manufacturer's model number: FBS