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Magpul MBUS AR15 Rear Sight Gen 2 Back Up Flip Up Rear Sight Polymer Black MAG248-BLK

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Magpul makes high quality injection molded parts and accessories, primarily for the AR15 rifle platform, right here in the USA. Polymer backup sights are popular for several reasons, including low weight, quiet operation, and durability. High quality polymer can take a certain amount of abuse without breaking, and still return to its original form, unlike metal, which may permanently deform, or even break.

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.


Item#: 2-MPIMAG248BLK
Total number of Reviews: 10

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5.0 5
"For the price, can't go wrong.Works."
5.0 5
"Go Magpul. Easy to sum up: works great with my DPMS Oracle. Hey, it's a back up sight. No complaints!"
5.0 5
"Very well made. Nice and tight, and good looking. Fits perfectly under my Primary Arms 3x magnifier as a back up."
4.0 5
"I have 16.5 inches of top rail on a 9mm carbine. Without having the sights hang off the ends, that places the sight radius at 13.5 inches. I go into further detail about that on my front sight review (under same name and title). As far as the rear sight goes, I like the sizes of the apertures, but flipping down the day aperture isn't as easy as it should be. I'd buy this item again."
5.0 5
"What can you say when it comes to anything Magpul produces. Quality at an affordable price. I have to say I wanted to avoid getting the flip up sights (front and rear) if I could. But, my red dot with it on a riser gave me the excuse to get the MBUS gen.2 for my M&P 15. And man, am I glad I got this sighting system as my backup. Sure I could've gotten another 1/2\" riser for the red dot and saved some money. But the MBUS looks great on my AR. And works outstanding and simple and quick to zero in. And once again, thanks to CTD for such excellent delivery time."
5.0 5
"Excellent accuracy and reliability. I use them on a BCM AR15 with a red dot. While at the range, my red dot became ineffective and the transition to the flip ups was easy. I had zeroed them a year prior and they were still easily putting rounds on the metal target at 100yds. These are a must have for a rifle without sights."
5.0 5
4.0 5
"I ordered this one and it's counterpart for the front end. When they arrived, this one had been packaged w/out a mounting screw or nut. This was an error on Magpul's part, not CTD, who has always provided quick shipping and great service. The front sight looks pretty good, so bottom line is I would buy this again."
5.0 5
"As expected with Magpul its a quality product."
4.0 5
"I used this sight on my first build this Spring. I had planned on using an optic, but wanted to familiarize myself with iron sights in case of a dead battery or other unforeseen problems that often occur in the field. First of all, great quality. I like the spring deployment on the sight, it is easy to manipulate even with gloved hands. The only reason I gave it 4/5 was the fact (more of personal preference) that when deployed, it uses the smaller aperture and it takes a bit of time to flip down the small aperture for close range shots. If you'll be shooting 50m+ the small aperture will work exceptionally well. Hope this review will help."