FAB Defense RBS Rear Flip-Up Back-Up Sight
Black
$52.35
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Compatible with
- Original gear from the manufacturer
- Ships from Israel
- Secure checkout
Specs
| Brand | FAB Defense |
|---|---|
| Model | RBS |
| Type | Rear flip-up backup sight |
| Mount | MIL-STD-1913 Picatinny rail |
| Apertures | 3 mm (low light) and 1.5 mm (precision) |
| Windage | Tool-free, detent lock |
| Material | Polymer and metal |
| Colors | Black, Flat Dark Earth, Gray, OD Green |
Key features
- Two aperturesFast 3 mm or precise 1.5 mm.
- Flips upSpring-locked deployment.
- Tool-free windageAdjusts by hand.
- Low profileSnag-free when folded.
Questions
What does it mount on?
Any MIL-STD-1913 Picatinny rail, such as on an M4, AR-15 or M16.
Which front sight pairs with it?
Any front sight; with the FAB Defense FBS it forms an optical tunnel.
Which aperture should I use?
3 mm for low light and speed, 1.5 mm for precision.
What colors?
Black, Flat Dark Earth, Gray or OD Green.
FAB Defense in the field
Built for the real world
See It in Action
Official video from the manufacturer.
The Full Rundown
Your backup when the optic quits.
The RBS is a low-profile rear flip-up sight with two apertures: 3 mm for low light and fast pickup, 1.5 mm for precision. Windage adjusts without tools.
The Good
- 3 mm and 1.5 mm apertures
- Spring-loaded flip-up
- Tool-free windage
- Low profile, snag-free
- Polymer and metal
- Four colors
Compatibility
- All 1913 Picatinny rails
- Pairs with the FAB Defense FBS front sight
The Bottom Line
Cheap insurance for any optic.