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Magpul MBUS Flip-Up Backup Sights

4.8 4.8 out of 5 stars 7,581 ratings

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Flat Dark Earth
Front Sight
Sights

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About this item

  • Made using the highest quality materials
  • Tested for durability
  • Designed to be safe and unique

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From the manufacturer

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Magpul MBUS Sights

MBUS front 1

MBUS 2

MBUS 3

MBUS 4

The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. It is constructed of tough, impact resistant polymer to provide light weight and resistance to operational use.

The spring-loaded flip-up sight is easily activated from either side or by pressing the top. The spring pressure and detent keeps the sight erect and in position when deployed.

The detent knob on the rear sight easily and positively adjusts windage, and the front sight includes an elevation adjustment tool. However, most aftermarket A2 front sight adjustment tools may be used as well.

Clamps to most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guard and provides the same height-over-bore as standard A2 irons. NOTE: Cannot be mounted to a railed gas block due to excess heat issues.

MBUS MBUS Pro MBUS Pro Offset MBUS Pro LR Rear
MBUS Sights MBUS Pro Sights MBUS Pro Offset Sights MBUS Pro LR Adjustable Rear Sight
Customer Reviews
4.8 out of 5 stars
7,581
4.8 out of 5 stars
1,683
4.8 out of 5 stars
544
4.8 out of 5 stars
451
Material Polymer Steel Steel Steel
Colors Available Black, Flat Dark Earth, Gray, Olive Drab Green Black Black Black
Weight Front: 1.2 oz; Rear: 1.3 oz Front: 1.5 oz; Rear: 1.8 oz Front: 1.8 oz; Rear: 2.0 oz 2.0 oz
Center of aperture to top of rail (Rear Sight) 1.42 inches 1.41 inches N/A 1.41 inches
Height above rail, stowed 0.51 inches 0.43 inches 0.18 inches (at clamp) 0.49 inches
Length, stowed Front & Rear: 2.6 inches Front: 1.6 inches; Rear: 2.1 inches Front: 1.9 inches; Rear: 2.0 inches 2.2 inches
Length, deployed Front & Rear: 1.5 inches Front: 1 inch; Rear: 0.83 inches 0.66 inches 0.83 inches
Selectable Front Sight Post Width - -
Elevation adjustment wheel for 200-600 meter distances - - -
Dual aperture rear sight
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Product Description

The MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-railed hand guards. Made in U.S.A. Impact resistant polymer construction provides light weight and resists operational abuse. Spring-loaded flip up sight easily activated from either side or by pressing the top. Detent and spring pressure keeps sight erect but allows for unobstructed folding under impact, etc. Clamps to most any MIL-STD-1913 Picatinny/STANAG 4694 railed hand guards and provides the same height-over-bore as standard A2 irons. Protective wings shield the spring-locking A2 front sight post. Elevation adjustment tool included, but most aftermarket A2 front sight adjustment tools may be used as well. NOTE: 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.

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Magpul MBUS Flip-Up Backup Sights


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Customer reviews

4.8 out of 5 stars
4.8 out of 5
7,581 global ratings

Customers say

Customers like the quality, ease of installation, and fit of the aiming scope sight. For example, they mention that it's heavy duty, built like a tank, and provides a good sight picture front and rear. They appreciate the value for money, saying that it is well worth your hard earned money. That said, they say the sight is easy to deploy when needed and fits tight on standard rails.

AI-generated from the text of customer reviews

1,074 customers mention1,008 positive66 negative

Customers are satisfied with the quality of the aiming scope sight. They mention that it's heavy duty, has excellent build quality, and is reliable gear. Customers also appreciate the sturdy construction and the tough plastic material. Overall, customers are happy with their purchase and recommend it to others.

"...The sights have never shot loose, never cracked, warped, disintegrated, or malfunctioned in any of the ways mentioned in some of the 1-3 star..." Read more

"...Made from high-quality polymer, these sights are designed to withstand the demands of real-world use, ensuring they hold up in various environments..." Read more

"...Could be my imagination: but I love this thing. It's solid, tight, retains zero, folds -REALLY- low (which is great) and what I like most: super..." Read more

"...When it comes down to a critical situation you need simplicity and reliability." Read more

495 customers mention495 positive0 negative

Customers are satisfied with the sight. They mention that it is a great back up sight, has a good sight picture front and rear, and is well made. Some say that the sight aperture is nice and accurate. Overall, most are happy with their purchase and recommend it to others.

"...It's in place faster than you can blink an eye! Good sight picture front and rear. They sit really low on the rail when not used...." Read more

"...With their durable construction, easy-to-use flip-up design, and trusted brand reputation, these backup sights have far surpassed my expectations,..." Read more

"...I can say that -MY- mbus II rear sight is terrific, and that it's my go to choice for any pici-rail gun platform that's in need of a backup rear." Read more

"...Product seems well made and sturdy, and I like the sight aperture, though I have never used one of that type before, just the..." Read more

396 customers mention369 positive27 negative

Customers appreciate the value of the aiming scope sight. They say it's well worth the hard-earned money. Customers also mention that it'll work well as a backup sight or as re-ar sight.

"...They are lightweight, low profile, durable, economical, and very user friendly. Just click or karate chop it, and it flips up...." Read more

"These was easy to install and looks great on my AR-15. The price was fair" Read more

"...But magpul are cost effective and in a drop test they seemed more durable than Diamondhead/Troy...." Read more

"...available for purchase, however, I think it is by far the best available for the cost ($55)...." Read more

305 customers mention286 positive19 negative

Customers find the installation of the aiming scope sight quick and easy. They mention that it mounts quickly and easily, and can be deployed when needed. The sight is well-constructed, simple, and durable, and snaps readily into place. Overall, customers are satisfied with the ease of installation and the well-planned design.

"...They are lightweight, low profile, durable, economical, and very user friendly. Just click or karate chop it, and it flips up...." Read more

"...The flip-up design allows for quick and effortless deployment when needed...." Read more

"These was easy to install and looks great on my AR-15. The price was fair" Read more

"Ordered for my new firearm. Easy to install and works grea. Very high quality and very accurate. Easy to adjust and use." Read more

245 customers mention193 positive52 negative

Customers like the fit of the aiming scope sight. They mention that it fits tight on standard rails, provides a nice wide plane for aftermarket front sights, and is easily adjustable. Some say that the sight fits perfectly under their scope and that it takes up minimal rail space.

"...The low-profile and slim design of these backup sights complement any firearm without adding unnecessary bulk or interfering with other..." Read more

"I love this sight to death. It's so tight to put on the rail I had to apply lube to the rail itself, tight tolerances are a good sign of quality..." Read more

"Site fits perfectly and great build quality." Read more

"...Easy to adjust for that. Once I had the backup sights adjusted which took 12 rounds total I co witnessed the red dot...." Read more

199 customers mention171 positive28 negative

Customers like the flip up feature of the aiming scope sight. They mention it's heavy duty, and it folds nicely. The spring action on the sight is fantastic, and the folding feature is nice if you're using it with an optic. It clicks down positively, and can be flipped up by either pressing the side.

"...They are lightweight, low profile, durable, economical, and very user friendly. Just click or karate chop it, and it flips up...." Read more

"...The low-profile and slim design of these backup sights complement any firearm without adding unnecessary bulk or interfering with other..." Read more

"...It's solid, tight, retains zero, folds -REALLY- low (which is great) and what I like most: super light weight...." Read more

"...I love the spring deployment feature as well...." Read more

165 customers mention145 positive20 negative

Customers like the appearance of the aiming scope sight. They say it looks great, totally legit, and sexy. They also appreciate the well-made, small size, and easy flip-up design. Overall, customers are satisfied with the appearance and functionality of the product.

"...every outing off pavement and away from the covered range, they still look new, aside from some dirt hiding in some of the small corners...." Read more

"...Their rugged construction, easy flip-up design, and trusted brand reputation make them the ultimate choice for ensuring accurate aiming and target..." Read more

"These was easy to install and looks great on my AR-15. The price was fair" Read more

"...my standard A2 front post sight when I received them, and look fantastic on my rifle...." Read more

151 customers mention130 positive21 negative

Customers like the adjustment of the aiming scope sight. For example, they mention it's easy to adjust for windage, elevation, and with the included tool. Some say the click detents are tactile and the adjustments work smoothly. That said, most are happy with the product's adjustment and visibility.

"...The Magpul MBUS sights are fully adjustable for windage and elevation, allowing for precise zeroing and accurate shooting...." Read more

"...on my M&P is better than the magpul because it has a more precise feeling adjustment (very tactile feeling clicks for adjustment)...." Read more

"...II MBUS rear sight is installed on any flat-top AR15 and easily adjusted for windage...." Read more

"...Very high quality and very accurate. Easy to adjust and use." Read more

Fell apart while adjusting.
5 Stars
Fell apart while adjusting.
I’ve never had an issue with these sights in the past until this one. I installed the sight to the rail and set up to zero with a bore sight laser. I put a quarter turn to the left and let go of the dial. The dial fell off and the “click ball” and spring flew out. There was either no roll pin in the dial to hold it in place or it was the wrong fit and fell out at some point. I still haven’t found a roll pin or the ball anywhere. I don’t have time for returns as I need to head out in a couple hours. For now, I’ve cut a #6 shot shell open to find out it’s a perfect size shot to use as a “click ball” and now gotta figure something out to replace the roll pin. This is messy and a shame. Never would’ve imagined that being an issue. Not gonna stop me from using MBUS sights though.
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Top reviews from the United States

Reviewed in the United States on February 5, 2014
Color: Flat Dark EarthStyle: Front SightPattern Name: SightsVerified Purchase
31 people found this helpful
Report
Reviewed in the United States on August 3, 2023
Color: BlackStyle: Front SightPattern Name: SightsVerified Purchase
3 people found this helpful
Report

Top reviews from other countries

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Glas Bauer
2.0 out of 5 stars Missing parts
Reviewed in Germany on March 6, 2020
Color: BlackStyle: Rear SightPattern Name: SightsVerified Purchase
Customer image
Glas Bauer
2.0 out of 5 stars Missing parts
Reviewed in Germany on March 6, 2020
First of all... the delivery took over a month... what is acceptable due to the corona crisis.
But what I dont understand is, when I buy an iron sight for 60,00€, that the mounting screw to fix it on the picatinny rail is missing! The package looked original and unopened, but the screw and counter washer just weren't there!
Its no so much of a deal cause already got a screw and a washer outa my stash and mounted it... but for this price I expect all parts included- also because it shows on amazon with the mounting screw and also in the instructions!
It would have been nice to have all parts of this sight originally from MAGPUL as thats what I paid for!
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十割蕎麦
4.0 out of 5 stars カラーが
Reviewed in Japan on September 2, 2023
Color: Flat Dark EarthStyle: Rear SightPattern Name: SightsVerified Purchase