The Magpul MBUS (Magpul Back-Up Sight) Rear is a meticulously engineered, color injection molded, folding back-up sight designed for seamless integration with the AR-15/M16 platform. This robust, low-profile rear sight provides a reliable secondary sighting solution, constructed to deliver performance and durability in a cost-effective package.
Key Features
Construction & Reliability
- Constructed from durable, color injection molded polymer, the MBUS Rear Sight delivers a resilient and lightweight sighting solution.
- Its spring-loaded flip-up mechanism allows for rapid, ambidextrous deployment via a side-actuated release or by pressing the top of the sight.
- Integrated protective wings shield the dual, same-plane flip apertures, mitigating potential impact damage and ensuring continued function.
- The design permits the sight to be folded with either the large or small aperture in position, ensuring operational flexibility without requiring aperture manipulation prior to stowage.
Precision Adjustment
- The MBUS Rear Sight features a dual aperture system, providing options for varied engagement distances and lighting conditions.
- Windage adjustments are executed precisely via a detent knob, ensuring positive and repeatable changes.
- This system offers 0.7 MOA (0.754 inches per 100 meters) per click with a 14.5-inch sight radius, and 0.5 MOA (0.547 inches per 100 meters) per click with a 20-inch sight radius, allowing for precise zeroing and adjustment.
Integration & Compatibility
- Engineered to fit most 1913 Picatinny rail equipped weapons, the MBUS Rear Sight is specifically optimized for the AR-15/M16 platform.
- Critical compatibility notes: This sight cannot be mounted to a railed gas block due to the significant heat generated in that region, which can compromise material integrity and performance.
- For proper function, if paired with an MBUS Front Sight, the front unit must be mounted to a railed fore-end on the same plane as the receiver rail. Consequently, this sight is not compatible with standard MOE Hand Guards without an appropriate rail section or gas block sight mounting solution.
Technical Specifications
- Type: Folding Back-Up Rear Sight
- Material: Color Injection Molded Polymer
- Color: Olive Drab Green (ODG)
- Aperture System: Dual, Same-Plane Flip
- Adjustment: Windage, Detent Knob
- Windage Adjustment Increment (14.5″ Sight Radius): 0.7 MOA (0.754″/100m) per click
- Windage Adjustment Increment (20″ Sight Radius): 0.5 MOA (0.547″/100m) per click
- Mounting Interface: 1913 Picatinny Rail
- Platform Compatibility: AR-15/M16 (optimized)
- Heat Compatibility: Not suitable for railed gas block mounting
- Manufacturing: Made in USA
