Magpul MBUS Pro LR Rear Sight - Black

Manufactured by Magpul Industries
Manufactured by Magpul Industries
8 Reviews

In Stock

Orders of non-FFL items will ship same-day if placed before 3:30pm CST. FFL orders will ship within 5 business days if transfer details are provided

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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 MBUS Pro LR is a case hardened steel back-up sighting solution protected by a Melonite finish for excellent corrosion resistance. With low-profile, sleek styling, the MBUS PRO LR adds an elevation adjustment wheel to accurately engage targets at variable distances.

The MBUS Pro LR features tool-less elevation and windage adjustments. Positive detents keep the MBUS Pro LR locked into place while stowed or deployed.

NOTE: The 200-600 m elevation adjustment wheel uses a hybrid calibration taking into consideration the following factors: 
  • Caliber: 5.56 NATO and 7.62 NATO
  • Cartridges: M855, M193, Mk262, TSX 55gr, M80, M118LR
  • Bullet weights 55 - 77 gr (5.56 NATO) and 147 - 175 gr (7.62 NATO)
  • Barrel lengths: 14.5” - 20"
  • Sight radius: 14.5” - 20" (5.56 NATO) and 18” - 20" (7.62 NATO)
  • Point of impact discrepancy: +2.5" to -5.0"
  • Assumes standard temperature and pressure

  • ~0.5 MOA (0.566"/100m) per click with a 14.5" sight radius
  • ~0.4 MOA (0.410"/100m) per click with a 20" sight radius
  • Case hardened steel construction with Melonite finish
  • Picatinny rail compatible
  • Tool-less windage adjustable
  • Elevation adjustment wheel for 200-600 meter distances in 50 meter increments
  • Positive detents in the up and down positions
  • Standard AR sight height when deployed
  • Height - Stowed: ~0.49"
  • Length - Stowed: 2.2"
  • Small aperture diameter: 0.07"
  • Large aperture diameter: 0.19"
  • Weight: 2.0 oz
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Fixed FoldingFolding
ManufacturerMagpul Industries
Weight2 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

Ratings & Reviews

8 reviews

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The perfect rear iron sight.


A perfect fit, very durable, accurate. Folds flush onto a flattop receiver. All-metal construction.Has a flip down precision aperture to reveal a larger close range/lower light/quick aquisition aperture with the same zero.Also very easy to adjust for both windage and height (I use it for a quick ranging zero). Very positive detents, will not move unless you move them.

Excellent Customer Sevice!!


Ordered my item online and it was shipped that same day!!! Like always, Primary Arms delivers excellent customer service and fast shipping.

Great product and service. Slow shipping.


The product shipped out of primary arms fast. Unfortunately the post office screwed up delivery and I received my product 2 days late.

Quick shipping...


Primary Arms seems to have the quickest shipping of any vendor I have purchased from. Ordered the front & rear set of the Magpul Pro sights on 3-29-16 arrived in my mailbox 3-31-16. You have certainly earned my repeat business!! You guys are great!

Please rate the product first


People, when writing a review on a product please give your 2 cents on the product quality and use, I know Primary Arms has great customer service and shipping but don’t give a review on a product and state Wow I got it in 2 days. Give an honest summary of the product and then close with how great the company’s service is. A lot of us use the reviews so see if the product is good or bad, we can’t gauge that by havin 75% of the total reviews just stating how fast it got to you. Thank you all

Magpul MBUS Pro

by -

Love the metal construction and small footprint. Definitely a great BUS


by -

Ok, just started building ARs. (i usually just buy them done, or use them in the military) and ventured into the area of iron sights. Bought the Troy industries sight unseen because the AR world said they were the gold standard in irons. I'm here to tell you these are head & shoulders above the Troys. They lock up ABSOLUTELY ROCK SOLID, have awesome elevation & windage controls, and are well thought out & designed. Honestly there's ZERO comparison; the troys simple don't lock up like these, and these will go on every build from here on out, period. Trust me, you'll love these once you mount them.

Mbus Pro


These are the best fold up sight your money can buy. Its worth it to me in my opinion. I have both their Offset Mbus Pro sets as well as their on top rail Mbus Pro sets with the LR rear. Actually, I have four sets. One on my 16, 14.5, 11.5 and 10.3 AR’s. I love these iron sights so much that it will be the only sights I will ever include on all my builds and recommend them as well. Thank you Primary Arms for such great pricing and fast shipping.—- Semperfi