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Magpul MBUS Gen 3 - Rear Sight

Rear Sight

In stock

Magpul MBUS Gen 3 - Rear Sight

$56.95 - $56.97
Rainier Arms Free Ground Shipping

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.


  • 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
  • Polymer construction, smaller size provides light weight and resists operational abuse
  • Clamps to most MIL-STD 1913 picatinny rails


  • Position: Rear
  • Height above rail, stowed: ~0.55 in.
  • Platform: AR10, AR15, M4, M16, M110, SR25
  • Weight with hardware: 30 g
  • Center of aperture to top of rail: 1.41 in.
  • Wind Adjustment:
    • ~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

Please NOTE: Products other than the rear sight is for display purposes only.

More Information
Product Type Rear Sight
Manufacturer Magpul Industries
Mount Picatinny

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