https://www.iwa.info/en/ausstellerprodukte/iwa23/product-10320753/fab-defense-set-fbs-und-rbs

FAB FBS Front Backup Sight foldable

The FBS Front polymer Back-up sight is a cutting edge, low-profile, tactical back-up sight.

The FBS front sight is elevation adjustable and can be mounted on all 1913 picatinny rails,
but is specialty made for the M4 / AR-15 / M-16 platform and the K.P.O.S.

Advantages:

Very low profile & slim design
Can be used as primary or back-up sight
State-of-The-art ergonomic & ambidextrous design
All manual configuration, no tools needed for elevation adjustments
Durable high grade polymer & metal construction
Spring based locking mechanism - will not break or deform

FAB RBS Rear Polymer Back-Up Sight

The RBS Rear polymer Back-up sight is a cutting edge, low-profile, tactical back-up sight.

The dual aperture RBS rear sight is windage adjustable and can be mounted on all 1913 picatinny rails,
but is specialty made for the M4 / AR-15 / M-16 platform and the K.P.O.S.

Advantages:

Very low profile & slim design
Can be used as primary or back-up sight
State-of-The-art ergonomic & ambidextrous design
All manual configuration, no tools needed for windage adjustments
Durable high grade polymer & metal construction
Spring based locking mechanism - will not break or deform

Since its inception in 1961, FAB DEFENSE has been developing and manufacturing the highest - quality, cutting-edge tactical equipment for Israel's Military and Police. For 45 years, FAB has worked closely with Israeli Special Forces and SWAT teams to design creative, no-nonsense solutions to the challenges met in the field.

FAB's current line reflects decades of design experience and continuous improvement through successive generations of weapon accessories, leading to superior ergonomics, functionality and durability.

We use state-of-the-art engineering, manufacturing and quality-assurance technologies and methods to ensure that the products we produce exceed even the most stringent industry standards. All of our products are rigorously tested in the harshest environments and under extreme conditions by some of the best tactical units in the world.

Our primary objective is always to provide our soldiers and law enforcement personnel with the tools they Need to carry out their missions, to give them an edge in the field, and to keep them safe.