Magpul MBUS Rear Sight FDE — Folding for AR-15

Description

The Magpul MBUS Rear Sight is a folding back-up sight designed for the AR-15/M16 platform and most 1913 Picatinny rail-equipped firearms. It provides a compact, flip-up dual-aperture option for use as a secondary or emergency sighting solution. The sight is injection-molded in polymer with protective wings to shield the apertures and a detent-style windage adjustment. It is spring-loaded for positive deployment from either side and is made in the USA.

Key Specifications

• The sight mounts to a 1913 Picatinny rail for direct attachment to common receiver and rail systems.
• Designed to fit the AR-15/M16 platform and like-configured rail systems.
• This is a rear dual-aperture sight intended for use as a back-up sight.
• Constructed from polymer using color injection molding for consistent finish and low weight.
• Finished in Flat Dark Earth for subdued, earth-tone appearance.
• The sight features a spring-loaded fold-up design that can be deployed from either side.
• Protective wings shield the dual, same-plane flip apertures when deployed or stowed.
• Windage is adjusted with a detent knob providing 0.7 MOA per click with a 14.5″ sight radius and 0.5 MOA per click with a 20″ sight radius.
• The dual apertures allow quick transition between a large and a small aperture without requiring sight removal.
• Base configuration is listed as Picatinny Rail for compatibility clarity.

Compact, lightweight, and purpose-built, the Magpul MBUS Rear Sight offers a reliable, non-optical backup option that integrates cleanly with common AR-15 platforms and rail systems. Its folding mechanism, protective wings, and positive windage detent make it a practical choice for shooters who want a robust, low-profile sighting solution that remains out of the way until needed.

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