Magpul MBUS Rear Sight - Olive Drab Green

Manufactured by Magpul Industries
Manufactured by Magpul Industries
20 Reviews

In Stock

Standard orders will ship out same day if ordered by 3:30pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



Magpul continues to grow and develop based on innovation, simplicity, and efficiency. At Magpul, mission driven requirements inform their product design, materials, and manufacturing, focusing on efficiency without sacrificing quality or performance.

The Magpul Back-Up Sight is a low-cost, color injection molded, folding back-up sight. Specifically tailored to the AR-15/M16 platform, the dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons.

  • ~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
  • Impact resistant polymer construction
  • Spring-loaded flip up sight
  • Detent and spring pressure keeps sight deployed
  • Compatible with most Picatinny receiver rails
  • Provides the same height-over-bore as standard A2 irons
  • Protective wings shield the dual, same plane flip apertures
  • Sight may be folded with either large or small aperture in position
  • Detent knob easily and positively adjusts windage
  • Height - Stowed: ~0.51”
  • Center of aperture to top of rail: 1.42”
  • Length - Stowed: 2.6”
  • Length - Deployed: 1.5”
  • Weight: 1.3 oz
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ColorOlive Drab Green
Fixed FoldingFolding
Manufacturer.Magpul Industries
Weight1.3 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

20 reviews

  • 3 stars
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  • 1 star
  • 0 reviews

Best backup sight for the money


*This is a backup sight...if you are into irons, then this is not for you.*Very durable. Low profile when folded down is perfect for optics. Standard aperture and low light aperture available. Perfect for backup in the event of optics failure. The push button deployment is ridiculously quick, and fold down is easy as well.The only cons to this sight is that there is no main sight version to be had.

Mbus rear sight


Easy to install, easy to use. Great magpul quality as usual.



Fits under all my AR height scope mounts. Very easy to adjust and deploy. I'm not planning on using this sight everyday but it's there if I need it.

Good sight especially for the price


Good sight at a decent price. Definately not the top of the line for all the iron sights out there, but decent. Primary Arms was super fast shipping at a reasonable price. Will buy from them again.



Great look, very smooth, good quality, its MagPul the best.

Well made and works great!


Great product and GREAT SERVICE that is second to none! Thanks Primary Arms!You have earned yet another loyal customer!

Magpul Backup Sights


Happy with the sights. The rear sight folds under my Primary Arms 3X Magnifier which is behind a EOTech 512. The front sight is on the front of a rail handguard. the front sight folds down below the EOTech. When both sights are up I have a target rear and front through both optics. Primary Arms is the best.

Great value


I have installed at least 20 MBUS SETS. No complaints at all

I love the rear sight


I love the product.



I was dead set on getting troy flip battle sights, but couldn't pull the trigger on price. I have a black rifle with od green accents, so i liked that these gave me a different color option, lighter, rave reviews, etc. I watched a few video reviews and read articles comparing the mbus to troy and diamondhead and was amazed when watching the drop test. I do not think these are the quality of the others but couldn't believe these things out lasted the others in harsh conditions. They broke but we're still usable and held zero where the metal options were bent and no longer serviceable. That was my selling point. Cheaper, lighter, and durable. Love it.