Magpul MBUS Front Sight - Olive Drab Green

Manufactured by Magpul Industries
Manufactured by Magpul Industries
13 Reviews

In Stock

Standard orders will ship out within 2 business days or less. 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 MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-railed handguards.

NOTE: Cannot be mounted to a railed gas blocks due to excess heat issues. Front MBUS must be mounted to a railed handguard on the same plane as the receiver rail.

  • ~1.6 MOA (1.886"/100m) per click with a 14.5" sight radius
  • ~1.2 MOA (1.367"/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 railed handguards
  • Provides the same height-over-bore as standard A2 irons
  • Protective wings shield the spring-locking A2 front sight post
  • Elevation adjustment tool included
  • Height - Stowed: ~0.51”
  • Length - Stowed: 2.6”
  • Length - Deployed: 1.5”
  • Weight: 1.2 oz
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ColorOlive Drab Green
Fixed FoldingFolding
Manufacturer.Magpul Industries
Weight1.2 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

13 reviews

  • 4 stars
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MBUS flip up front sight


Arrived quickly. Fits properly. Works as expected. MBUS are good quality and rugged. An excellent choice for back up sights.



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

MagPul... nufsaid!


Great product! Solid design & perfect fit.

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 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.



Item arrived as promised with quick turn around on the shipping. Will do business with again.

Magpul sites for the win!


Item just as ordered and very fast shipping. Thank you Primary Arms.

Does the job.


Just as the title says, these sights do the job just fine. If all you shoot with are irons, maybe you want to go with the more expensive all-metal sights, but for B(ack)U(p)IS, these are great.

Magpul flip up front sight


Looks and works great. Mounts solid to the yhm diamond series rail. Very happy with the product and service.