FAB Defense RBS Black Folding Rear Sight for Picatinny Rail — a reliable low-profile diopter rear sight for modern weapons, perfectly suited for M4/AR-15/M16 platforms and mounting on standard 1913 MIL-STD Picatinny rails.

Brief Description and Purpose

The FAB Defense RBS is a folding rear sight designed for quick and accurate aiming in various conditions. The model features two apertures of different diameters, allowing the shooter to instantly choose the optimal aiming option: a larger opening for fast aiming in low light and a smaller one for maximum precision.

Key Advantages

• Dual-aperture diopter rear sight with 3mm and 1.5mm diameter openings.
• Instant aperture selection without additional adjustments.
• Can serve as a primary or backup sight.
• Low-profile when folded — does not interfere with equipment and does not rattle during operation.
• Robust spring-loaded detent ensures reliable fixation in the operational position: does not fold spontaneously, does not break or deform.
• Front sight height adjustment is tool-free.
• Made of high-grade metal and durable polymer.

Technical Specifications

The FAB Defense RBS is an excellent choice for those seeking a compact, durable, and versatile rear sight. The design allows for intuitive use in the field: change the aperture depending on the situation, use it as a primary or backup sight, and get stable fixation thanks to the spring mechanism. Materials and assembly guarantee a long service life even with intensive use.

This rear sight will be useful for both novice shooters and professionals who value quick reaction and sight reliability. Suitable for sport shooting, tactical tasks, and use in training programs.

Other products in this category here Front and Rear Sights