FAB Defense RBS Tan Folding Rear Sight for Picatinny Rail
FAB Defense RBS is a folding low-profile diopter rear sight that mounts on 1913 MIL-STD Picatinny rails. This sight is designed as a reliable primary or backup sight for firearms, combining a durable metal construction and long-lasting polymer. The product color is Desert Tan (Coyote Tan), listed as sand in the catalog.
Key Features and Characteristics
- Dual aperture sight: two aiming apertures — a large 3mm diameter for quick aiming and low-light shooting, and a small 1.5mm diameter for more precise aiming.
- Quick aperture selection: switching between apertures is instantaneous using a convenient arrow.
- Can serve as a primary or backup sight, maintaining compactness when folded — low profile, does not snag on gear and does not rattle during use.
- Instant installation mechanism with a spring-loaded detent ensures reliable fixation — the structure will not fold on its own or deform under normal operation.
- Front sight height adjustment is tool-free, simplifying quick sight zeroing.
- Made of high-grade metal and durable polymer for longevity and resistance to loads.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | FAB Defense |
| Model | RBS |
| Type | Diopter Rear Sight |
| Mounting Base | Weaver/Picatinny (1913 MIL-STD) |
| Material | Metal; Polymer |
| Color | Desert Tan (Coyote Tan) — sand |
| Package Contents | Hex key |
| Weight | 30 g |
| Width | 32 mm |
| Height | 14 - 42 mm |
| Overall Length | 30 - 52 mm |
| Overall Dimensions (mm) | 30-52 x 14-42 x 32 |
| Weapon Attachment | Permanent |
| SKU | fx-rbs |
| Country of Manufacture | Israel |
FAB Defense RBS is an optimal solution for those who value aiming speed, mechanism reliability, and compactness when folded. This sight is suitable for combat and training scenarios, easily mounts on a standard Picatinny rail, and withstands intensive use thanks to high-quality materials. If you need a versatile, fast-acting, and durable diopter rear sight in a sand finish — the RBS will be an excellent choice.
Other products in this category here Front and Rear Sights
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