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Magpul

Magpul MBUS Flip-Up Backup Sights, Black, Rear Sight

  • Based on 4,956 reviews
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Color: Black


Size: Rear Sight


Features

  • 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 rail 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

Description

Reliable Backup for Battery Failures: The Magpul MBUS Front Back-Up Sight Gen 2 is a low-profile, adaptable sight designed for AR15/M16 platforms. It automatically deploys with minimal pressure and offers adjustable elevation for 1/3 co-witness with red dot sights. Crafted from impact-resistant polymer, it withstands harsh conditions and is compatible with most Picatinny-railed handguards, providing the same height-over-bore as standard A2 irons. It's a dependable backup sight for tactical or emergency situations.

Brand: Magpul


Color: Black


Style: Rear Sight


Product Dimensions: 4"L x 6.6"W x 1.2"H


Sport: Hunting


Item Weight: 1.44 ounces


Material: polymer or aluminum


Magnification Maximum: 1 x


Magnification Minimum: 1 x


Compatible Devices: Rifle


Magnification Maximum: 1 x


Magnification Minimum: 1 x


Compatible Devices: Rifle


Mounting Type: Picatinny Mount


Hand Orientation: Rear


Thread Type: Picatinny


Reticle Type: Crosshair


Item Dimensions L x W x H: 4"L x 6.6"W x 1.2"H


Item Weight: 1.44 ounces


Item Display Weight: 2 pounds


Item Display Dimensions: 7.75 inches


Color: Black


Product Style: Rear Sight


Lens Color: Black


Material Type: polymer or aluminum


Brand Name: Magpul


Sport Type: Hunting


Team Name: Magpul


Number of Packs: 1


Model Name: MBUS Flip-Up Backup Sights


Manufacturer: Magpul


Number of Items: 1


Unit Count: 1 Count


UPC: 711091345887 789632564127 757183089864 873750004358


Global Trade Identification Number: 58


Included Components: Magpul MBUS Flip-Up Backup Sights, Black, Rear Sight


Item Type Name: MBUS Sights


Model Number: MBUS


Manufacturer Part Number: MAG248-BLK


Warranty Description: Limited lifetime warranty


Frequently asked questions

These backup sights are mainly designed for use with AR-15/M16 firearms, but can be suitable for any platform equipped with a Picatinny or Weaver rail system.

The MBUS sights are made from high-quality injection-molded polymer, making them extremely durable and resistant to temperature changes and impact damage.

Yes, the rear sight is adjustable for windage while the front sight is adjustable for elevation. No tools are needed for adjustment, making it easy to make precise changes even when on the range or in the field.

The Magpul MBUS operate manually. They are spring-loaded and can be flipped up or down using the side-mounted pressure button. But they stay securely in place once set.

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Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The reviews of this product highlight its strong build, easy installation and reliable performance as a backup sight. The adjustability of the sight praised, while its affordability gets a notable mention. One reviewer has even shared a detailed experience about using it with a Sig Sauer MCX Virtus and mentioned that the sights offer great accuracy.

Pros

  • 👍 Strongly built and durable
  • 👌 Quick and easy installation
  • 💯 Adjustability and functionality as a backup sight
  • 💲 Affordable price
  • 🎯 Offers good accuracy

Cons

  • 👎 Some users may find the sight to be 'chunky'
  • 💡 May affect weapon light setup due to its size
  • 🔨 Mounting on the rail can be a bit stiff and might require force

Should I Buy It?

Based on the reviews, this product is highly recommended for its durability, ease of use, and affordability. If you need a reliable and well-performing backup sight for your paint marker or rifle, this should be a strong contender. However, be prepared for a possible impact on your weapon light setup if you choose this sight.

    • With a bit of common sense, you too can be satisfied
Color: Flat Dark Earth Size: Front Sight
Okay, I want to talk a bit about these sights. Magpul makes good stuff, and they are innovative. I have two sets of these sights mounted to a couple of my AR15's. They are lightweight, low profile, durable, economical, and very user friendly. Just click or karate chop it, and it flips up. Push it down and it locks back down. That's it! No weird cross pin style locking mechanisms, no need to push up and lock into place. When time is of the essence, just reach up with your thumb and CLICK! 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. Installation is simple. Just push it on from the end of your AR15's picatinny rail, locate your preferred mounting spot, and put the provided screw through the sight and rail and tighten it with a screwdriver. Really, these sights are idiot-proof... or are they? Magpul should not have to put a disclaimer stating not to mount polymer sights to gas blocks. I figured it was only common sense, but after reading the interwebz and a couple of reviews from here, there are people out there who actually figured you could mount these to gas blocks, until they read the fine print... and the blamed the sights themselves. Like I said, I figured it was common sense, but then again, McDonald's was sued because a woman spilled her coffee in her lap and the cup wasn't labeled "HOT COFFEE." Go figure. Additionally, these sights are engineered to sit on top of accessory rails (rears on AR15 flat top receivers). Of course, you can mount them to other guns, but I'm speaking to the other group of people who can't get them to sight in right because they disregarded common sense and logic and actually mounted these sights to gas blocks, and then fired the gun! Most gas blocks sight below rail height. If you want a gas block mounted sight, buy one specifically designed with the extra height (and metal) in mind. Just don't go around dogging these sights because you didn't read before you installed them. As for durability, some people are saying that because they are plastic, they will break. Okay, well then how do you explain Glocks, FN's, XD's, M&P's and such? Oh I'm sure some have broken, but most plastic guns that are fighting in wars and being used for LE, are holding up just fine to the sort of abuses they are subjected to. My AR15 is my working gun. The MBUS sights installed on it are no exception. That AR rides in the back of pickup trucks, gets used in harsh desert conditions, fears no snow, goes up the rocky mountainsides with me, and generally sees an assortment of things that safe queens and bench rest guns would never dream of. 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 reviews. In fact, despite being on my AR15 for over a year, and accompanying me on just about 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. They also cowitness to the lower 1/3rd of an Aimpoint Comp M3 in a Larue LT150 mount. ... show more
Reviewed in the United States on February 5, 2014 by James Likes Cheese
    • Best all around back up sight without breaking the bank
Listen, a lot of guys will whine and say that the mbus sight is not the best choice for a folding back up AR sight, claiming that there are far better designs out there that beat the Magpul. I agree that it is not a Troy, but it sure is a lot cheaper, and when you look at it with value for the money in mind, it wins. I recently saw an online torture test of a bunch of folding back up sights and the mbus won over the Troy and some other high dollar sights because it held zero better and did not break after being attached to a rifle and then dropped sight first onto concrete! The polymer design is the same high quality type used to make Glocks, and we all know how serious their reputation is for durability and quality. Magpul makes great stuff and they understand today's average consumer is not made of money either, so they worked out a great balance between reliability, quality, and affordability. I like the apertures as the sizes are perfect. The smaller aperture is a good all around diameter and the larger seems good for close quarters combat or low light conditions. Sure the mbus rear sight is only windage adjustable, but within around 200 meters, this will do the trick. From my memory, the Army standard is to zero iron sights at 25 yards for a usable battle setting out to 250 meters for 5.56. Remember that this is a fairly flat round in as the bullet drop factor is minimal at normal combat distances, actually average 55 grain ball rounds only drop around 9 inches at 200 yards. When you do want to reach out further than a few hundred meters you may want to be using a magnified optic anyway because of ease of adjustment and precise visibility. So just get one already, you won't regret it! ... show more
Reviewed in the United States on September 17, 2012 by John S.
    • Reliable and Versatile Backup Sighting Solution!
Color: Black Size: Front Sight
The Magpul MBUS Flip-Up Backup Sights are an essential addition to any firearm enthusiast's setup, providing reliable and versatile backup sighting options. With their durable construction, easy-to-use flip-up design, and trusted brand reputation, these backup sights have far surpassed my expectations, offering exceptional performance and peace of mind. The standout feature of the Magpul MBUS Flip-Up Backup Sights is their rugged construction. Made from high-quality polymer, these sights are designed to withstand the demands of real-world use, ensuring they hold up in various environments and shooting conditions. The flip-up design allows for quick and effortless deployment when needed. The spring-loaded mechanism ensures the sights lock firmly in place, providing a stable and precise aiming solution. The Magpul MBUS sights are fully adjustable for windage and elevation, allowing for precise zeroing and accurate shooting. Magpul is a trusted brand known for its top-notch firearm accessories, and the MBUS Flip-Up Backup Sights reflect that dedication to excellence. They are a preferred choice for both professional shooters and casual firearm enthusiasts alike. The low-profile and slim design of these backup sights complement any firearm without adding unnecessary bulk or interfering with other accessories. In conclusion, the Magpul MBUS Flip-Up Backup Sights are a must-have accessory for firearm owners seeking reliable and versatile backup sighting solutions. Their rugged construction, easy flip-up design, and trusted brand reputation make them the ultimate choice for ensuring accurate aiming and target acquisition when needed. If you're looking for high-performance backup sights for your firearm, the Magpul MBUS Flip-Up Backup Sights are the perfect option. I highly recommend these sights for their outstanding performance and the peace of mind they bring to my shooting experiences! ... show more
Reviewed in the United States on August 3, 2023 by Steven

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