The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15/M16 platform.
- 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 flip apertures
- Detent knob easily and positively adjusts windage
- Polymer construction provides light weight and resists abuse
- Detent and spring pressure keeps sight in place but allows for unobstructed folding under impact
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