Magpul MBUS Rear Flip Up Sight - Black

Manufactured by Magpul Industries
Manufactured by Magpul Industries
212 Reviews
No Longer Available
For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details



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 MBUS 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
See More


Fixed FoldingFolding
ManufacturerMagpul Industries
Weight1.3 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

MagPul MBUS Gen 2 Flip-Up Rear Sight


Great product (and Service!).Have since bought(and received) both front and rear sights for AR-15 (300 Blackout).

excellent item


A good low cost backup sight

Awesome Customer Service... GREAT Products!


A HUGE HUGE thank you to mike at 1153 for all of your help. He helped me with anything and everything and made me a lifetime customer. Fast shipping as usually with PA. Thank you again Mike!

Great Buis


A nice decent rear sight that wont break the bank.Primary Arms does it again with good pricing and amazing fast shipping. They are the Best.

Great sight


Absolutely great sight, works just like it should. Would expect nothing less from Magpul.

The Real Deal


After having been duped with a knock-off on a certain large online retail site, I was happy to have a better experience with PrimaryArms.



Always great to work with and your dealer prices make it easy to sell stuff.

MBUS Rears


Another awesome product from Magpul. Low profile when folded, secure when flipped up, and a lighter than the metal piece it replaced. Thanks again to PA for super quick shipping.

MagPul MBUS Gen 2 Rear Sight


As for their Front Sight, MagPul is value for money. They look good and work as well as they look.

MagPul MBUS Gen 2 Flip-Up Rear Sight Black


As usual a great product from Mag Pul. It serves the purpose for which I bought it. Have several of them!