MAGPUL MBUS® Rear Gen 2 (FDE)
The MAGPUL MBUS Rear Sight in FDE is an affordable, robust folding back-up sight designed for AR15/M16 platforms. This spring-loaded, dual-aperture sight is easily activated and adjusted for windage, and it fits most 1913 Picatinny rails. Its impact-resistant polymer construction ensures durability while maintaining lightweight. The MBUS Rear Sight features protective wings for the apertures and a detent system that keeps the sight upright but allows it to fold under impact. Ideal for seamless integration with standard A2 irons, it offers reliability and precision in a compact, efficient design.
Features
- Spring-Loaded Flip-Up Sight: Spring-loaded flip-up sight easily activated from either side or by pressing the top. Protective wings shield the dual, same plane apertures. Sight can still be folded with either a large or a small aperture in position. The detent knob easily and positively adjusts windage.
- Impact-Resistant Polymer Construction: Polymer construction provides lightweight and resists operational abuse.
- Detent and Spring Pressure Keeps Sight Erect: Detent and spring pressure keep sight erect but allow for unobstructed folding under impact, etc.
- Clamps to Most MIL-STD-1913 Picatinny Rails:Â Clamps to MIL-STD-1913 Picatinny/STANAG 4694 receiver rail and provides the same height-over-bore as standard A2 irons.
Specifications
- Height above rail, stowed:Â ~0.51 in.
- Length, deployed:Â 1.5 in.
- Length, stowed:Â 2.6 in.
- Weight, w/hardware:Â 1.3 oz.
- Center of aperture to top of rail:Â 1.42 in.
- Windage Adjustment
- ~0.7 MOA (0.754″/100m) per click with a 14.5″ sight radius
- ~0.5 MOA (0.547″/100m) per click with a 20″ sight radius
MADE IN THE USA





Gayland Freeman –
Good service, cheap shipping, can't ask for…
Good service, cheap shipping, can’t ask for more