Overview

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.
Advantages:
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 flat dark earth
Compatibility:
All 1913 Picatinny rails
The FBS should never be mounted on a railed gas block