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The next evolution in our MBUS (Magpul Back-Up Sight) line, the MBUS 3 incorporates the best features, strengths and value of our original MBUS and MBUS Pro Sights in a feature-packed back-up sight system.

Significantly reduced in size from the MBUS, it sits at just 0.55” high when folded, 1.38” at its widest point, and weighs a scant 30 grams with hardware. Its aesthetics are derived from the MBUS Pro, but the MBUS 3 Rear Sight is constructed of our impact-resistant polymer, making it lightweight and extremely durable. Featuring the same spring-loaded technology as its predecessor, they can be deployed with an ambidextrous push-button.

The MBUS 3 Rear Sight sits at standard AR-height when deployed and includes a windage adjustable, rapid-select aperture system.

MBUS 3 Sights will be available in Black, Flat Dark Earth, and OD Green.

Made in the USA.

  • FULL-FEATURED SPRING-LOADED FLIP UP SIGHT; Ambidextrous push-button deployment and rapid-select rear aperture system. 0.55” high when folded and 1.38” wide at widest point. Standard AR-height when deployed.
  • IMPACT-RESISTANT POLYMER CONSTRUCTION; Polymer construction, smaller size provides light weight and resists operational abuse.

Position: Rear
Height above rail, stowed: 0.55in
Platform: AR10, AR15, M4, M16, M110, SR25
Weight, w/ hardware: 1.06oz

Center of aperture to top of rail: 1.41 in.


~0.5 MOA (0.606”/100m) per click with a 14.5″ sight radius
~0.4 MOA (0.439”/100 m) per click with a 20″ sight radius


Colors: No selection

Black, Flat Dark Earth (FDE), Olive Drab Green


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Magpul MBUS 3 Rear Sight Black

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Magpul MBUS 3 Rear Sight Black
  • UPC840815132196

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5004 State Highway 74 Cape Girardeau, MO 63701
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