MPN: MAG1167


  • Ambidextrous push-button deployment and rapid-select rear aperture system
  • Standard AR-height when deployed
  • Adjustable windage
  • Full-featured spring-loaded flip up sight
  • Polymer construction, smaller size provides light weight and resists operational abuse
  • Clamps to most MIL-STD-1913 Picatinny rails
  • The Magpul Back Up Front Sight MBUS 3 comes in: Black, Flat Dark Earth, and OD Green
  • Made in the U.S.A.

Magpul Back Up Sight MBUS 3 (Rear)


  • Material: Polymer
  • Finish: Black, Flat Dark Earth, or OD Green
  • Weight: 1.06 oz.
  • Width: 1.38"
  • Height Above Rail, Stowed: 0.55"
  • Height Above Rail, Deployed: Standard AR-Height
  • Windage Adjustment (14.5" Sight Radius): 0.5 MOA per click
  • Windage Adjustment (20" Sight Radius): 0.4 MOA per click


  • Any firearm with top Picatinny top rail

**NOT recommend mounting on a railed gas block due to excess heat issues.

**Sight is designed to work on same-plane rail systems only. Will not work with a railed gas block that is higher or lower than the receiver.


  • 1x Magpul Flip-Up Rear Sight (MBUS 3)


Magpul is more famous for its excellent AR magazines and ergonomics grips. However, they also make an amazing set of backup sights. The Magpul Back Up Sights (MBUS) 3 are designed to work with any firearm that has MIL-STD-1913 Picatinny rails, and they are exceptionally effective with AR pattern rifles.

Here we have the MBUS 3 rear flip-up sight. This simple aperture sight offers excellent target acquisition and a clear sight picture when used with the MBUS 3 front sight. The MBUS 3 rear sight is easily adjustable for windage without any tools. It can be deployed with an ambidextrous push-button and has a rapid-select rear aperture system, which allows you to switch between a narrow and wider aperture.

The MBUS sights are made from super durable and high-quality polymers. They are lightweight and super durable, ideal for any rugged environment. These sites are available in multiple colors, including Black, Flat Dark Earth, and OD Green.

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