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4.7 out of 5 stars. 55 reviews
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Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up

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Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up

Item # 6123608

Magpul Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up
Magpul Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up
$55.99

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  • New Arrival

  • Online Only

Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up

Item # 6123608

Magpul Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up
Magpul Magpul MBUS Rear Sight for AR-15/ M16, Olive Drab Green, Polymer, Spring-Loaded Flip Up

$55.99
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The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The dual aperture MBUS Rear Sight is adjustable for windage and fits most 1913 Picatinny rail equipped weapons, but is specifically tailored to the AR15/M16 platform. Spring-loaded flip up sight easily activated from either side or by pressing the top release. Protective wings shield the dual, same plane flip apertures. Sight can still be folded with either large or small aperture in position. Detent knob easily and positively adjusts windage. 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. Cannot be mounted to a railed gas block due to excess heat issues. Front MBUS must be mounted to a railed fore end on the same plane as the receiver rail. Because of this the sight is also not compatible with MOE Hand Guards. Made in the USA.

  • MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight
  • Dual aperture MBUS rear sight is adjustable for windage
  • Fits most 1913 Picatinny rail-equipped weapons, but is specifically tailored to the AR15/M16 platform
  • Spring-loaded flip-up design is easily activated from either side or by pressing the top release
  • Protective wings shield the dual, same-plane flip apertures
  • Sight can still be folded with either large or small aperture in position
  • Detent knob provides easy, positive windage adjustment
  • Windage adjustment click values: 0.7 MOA (0.754"/100m) per click with 14.5" sight radius
  • Windage adjustment click values: 0.5 MOA (0.547"/100m) per click with 20" sight radius
  • Cannot be mounted to a railed gas block due to excess heat issues
  • Front MBUS must be mounted to a railed fore end on the same plane as the receiver rail
  • Not compatible with MOE Hand Guards
  • Made in the USA
  • Firearm Fitment: AR-15
  • Color: Olive Drab Green
  • Firearm Type: AR Platform
  • Frame Material: Polymer
  • Mount Type: Picatinny Rail/STANAG 4694 Rail
  • Style: Folding Back Up Sight
  • Weight: 1.30 oz
  • Windage Adjustment: 50 MOA

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Reviews

Rating Snapshot

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45 reviews with 5 stars.
7 reviews with 4 stars.
2 reviews with 3 stars.
0 reviews with 2 stars.
1 review with 1 star.

Overall Rating

4.7
32 out of 34 (94%) reviewers recommend this product

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Summary of Reviews

AI-generated from customer ratings & reviews, and may include incentivized reviews.
Customers overwhelmingly praise these rear sights as essential, high-quality backup optics delivering exceptional reliability and durability. Most highlight their rugged, trouble-free construction that withstands rigorous use, effortless installation requiring no tools, and perfect co-witness alignm...
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1 to 4 of 55 Reviews .
1 – 4 of 55 Reviews
Review 1

K.I.S.S.

10 days ago
This was the perfect rear site to pair up with my M4 front site. This is a no-frills budget minded A.R. 15 build. A bare-bones A.R. 15 with no magnifying optics, scopes, red dots, lasers or any of the other Lego gadgets that are available. I had to pull the set, screw completely out and then use a rubber mallet to tap the site onto the Picatinny rail. You will probably have to do this too. It was a tight fit. Again for the money it’s hard to beat.

Yes, I recommend this product.

Originally posted on Magpul

Washington State
Review 1

Got my eye 👁️ on you.

3 months ago
Excellent quality product. Exactly what I expected.

Yes, I recommend this product.

Originally posted on Magpul

Oklahoma
Review 1

Tought to Get on, but Solid

5 months ago
Had to beat the heck out of this thing to get it on, but once it was on, it'll probably never be removed anyways. It's reliable and perfect height though so I can't complain.

Yes, I recommend this product.

Originally posted on Magpul

Texas
Review 1

Locking mechanism failure

10 months ago
I bought this 3 years ago and had to use them in the field once. Great product BUT the rear sight held up for maybe a year before the locking mechanism that keeps it clicked down failed and it has since sat up against the bottom of my scope. Maybe it's just a bad piece but I never did any tuck and rolling to cause it to fail. The front sight is holding great.

Originally posted on Magpul