MBUS Flip-Up Backup Sights, Black, Rear Sight

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 manufacture. Feels solid, not flimsy or wobbly. Spring retention ensures that after each shot it returns to zero. Also, the square top of the sighting ring makes obtaining accurate aim faster. I have an A3 type rifle, and the standard A2 front sight with it's dog ears protecting the front sight blade: point directly to the squared edges of this rear sight's peep ring. Which actually makes acquiring the target seem easier and faster than if it were a perfect circle rear sight ring. Maybe it's psycho somatic where it's purely me, but it quite honestly seems faster on target than metallic orb rear peeps. the square top of the sight ring, purely objectively to me at least, seems to aid in my finding the center with the front sight blade because the dog ears protecting the blade have an extra frame of reference by branching off towards the square radii left and right of the rear peep. 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 light weight. I don't like quad rails and hanging off 5 pounds of junk on my rifles. I don't put anything on one of my rifles unless the added capability the accessory brings justifies the weight it brings. I like an Ar-15 carbine to be light and fast, transition target to target quickly. I wouldn't hesitate to put one of these on any pic rail that needs a backup rear. Be it a full fledged A3/A4 combat rifle or a $5k race gun that has to have a rear sight to qualify for a division or specific course of fire. Fits tight, holds zero and weighs next to nothing: you can't go wrong with one of these. I have -NOT- had hands on experience with the mbus II FRONT sight, only the rear: so I cannot offer an informed opinion about the mbus front sight. I can say with relative confidence, I have a high opinion of magpul products in general and if the front sight is of equal quality to their rear sight - I wouldn't hesitate to use that either. I cannot however, give first hand account of what the front sight is like. 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.

I've been running Troy Micro flip sights on my other rifle for about a year now. While certainly fantastic sights, there are two major drawbacks - one: you have to manually flip the sights up by pulling on them, and two: The sight will not fold down correctly if you prefer using the small aperture - the large aperture is in place by default. So when I bought my second AR, a Sig M400 Enhanced, it came with a less-than-stellar rear flip sight that had the same basic functionality of the Troy, but without the button lock. Being that I didn't plan on mounting an optic any time soon, I realized the need for a quick deploy rear sight. That's why I purchased the Magpul Gen 2 MBUS rear sight - and for my usage - it's absolutely perfect. Everything about the sight screams quality. It's quite heavy for polymer, which I wasn't expecting, but still shaved some weight off of my AR (all Magpul MOE furniture to keep it light). It pops up quickly when needed and tuck away quickly when I don't, were zeroed in with my standard A2 front post sight when I received them, and look fantastic on my rifle. I had used and abused a first gen set on a different rifle and they never let me down, so I don't expect this one to either. Magpul is a company known for constantly striving to improve and perfect their products. Don't listen to any naysayers about it being a "cheapo plastic sight" - These things are built like a tank and I actually prefer mine to the Troys I have on my primary rifle. If you need a flip up rear sight and are considering buying this - just do it - if you don't like it - return it or sell it on Ebay for a minimal loss.

Like almost everything Magpul makes, this is a great product, especially for its cost. I do not think it is the best BUIS available for purchase, however, I think it is by far the best available for the cost ($55). I have owned and used cheap $25 UTG back up rear sights and I have owned and used $125 Troy rear BUIS. The Troy sight that I have mounted on my M&P is better than the magpul because it has a more precise feeling adjustment (very tactile feeling clicks for adjustment). The magpul has held zero very well and adjustment is easy and fairly precise (a little more play between clicks). It took a while for me to figure out how to work them, but this sight does have dual apertures, though in my opinion it would not have mattered if it did not because I use the sight strictly to back up the vortex sparc (which has also surpassed my expectations) mounted on this rifle. The dual aperture mechanism seems a little flimsy because they "sandwich" together instead of being able to flip from one aperture to the other like most iron sights. I have found no problem thus far, but the way they click together could become problematic. That is just my opinion and for others information to point out that it is not the traditional dual aperture used in a carry handle or 95% of other AR back up sights. My notions of future problems obviously didn't effect my 5 star rating. If it were my only sight on the weapon, I would probably spring for a better sight, but I purposely bought a less expensive sight for a gun that I was not intending to drop a lot of cash into. I love the spring deployment feature as well. It is also very sturdy, unlike the old UTG sight that I had (after about 6 months it wouldn't stay in the "up" position). If you are even considering a cheaper folding rear sight (i.e. UTG, NC Star, etc.), go ahead and save up for this one. You won't be sorry.

Pro's: Well Made Accurate/Adjustable and keeps zero after adjustment Ease of Install Operate Easily (flip up/lock down) Priced Right Con's: None that I have been able to find I purchased my wife an AR Flat Top with no sights a couple years ago. I had Yankee Machine Company sights on mine which are fantastic sights but they are very expensive. I had owned several Magpul products over the years and have been well pleased so I thought, for this price, I will give a set (front and back) of these a try. I was extremely pleased. They enstalled quicly and were very close to zero out of the box. Adjustments work easily and I zeroed these in. They have maintained that zero for almost two years now. Note. I have not removed them for any reason so actually one should not expect loss of zero unless I otherwise caused a problem like a strike against the weapon or dropping the weppon. The sights lock down solidly and flip up at a push of a button that is well placed for easy access. Are they YMC sights? No, they are not. But they are not over $200 for the pair. If you are budget contious but you demand a product that will work and work every time, you won't go wrong with these. Not only have I recommended them to friends I have two times ordered and installed these for friends.

These were the gold standard of back up iron sights (BUIS) for a long while. They were recently replace with the mbus 3 from magpul. However they are still a nice reliable and dependable back up flip up sight. I used these for years and never had any issues with any of the ones i owned. Great value for the price, and would recommend these if you don't like the new model. They are nice and pretty thin so they lay flat under optics and dont stick up too much when folded down.

The MBUS is the industry standard for high quality "iron" sights. Magpul has perfected the use of polymer accessories that are lightweight and strong. These rear sights are adjustable for windage, and the front sight (not included here) are adjustable for elevation. Some people say that backup iron sights are not necessary because scopes and red dots have become reliable. The truth is that all sights fail, even iron sights, so it's never a bad idea to have a backup sighting system, and the MBUS is probably the best option.

These sights are wonderful, some people say Troy are better and I do not disagree that troy are quality back up sights. But magpul are cost effective and in a drop test they seemed more durable than Diamondhead/Troy. Not only did they retain zero better than the others, but they seemed to handle impact better than metal. Taken from an article on KitUp "In order to test whether certain popular BUIS would still be serviceable after taking a hard hit, I attached three different types of BUIS - Troy Industries, Magpul Industries and Diamondhead USA - to an AR-15 rifle chambered in .300 AAC Blackout weighing 7 pounds and dropped the rifle upside down from a height of 5 feet onto a concrete surface. Other portions of the rifle were protected from damage, and each set of BUIS took a solid hit from the drop. The ammunition used was Remington Premier Match .300 AAC Blackout 125 gr OTM. Each sighting device was installed according to the manufacturer's instructions, then points of impact was established from a stable shooting position at 25 and 200 yards. After the drop, the rifle was fired again, and any change in point of impact noted. The first BUIS dropped was the Diamondhead. At first, damage appeared cosmetic only; however, the apertures could no longer be rotated, windage could not be adjusted, and there was a definite cant to the BUIS. Point of impact shifted approximately 16 MOA. We contacted Diamondhead with this result. They replied that a newer version was available which was more durable. We offered to test the new model but production issues meant they could not ship one to us. Next came the Troy sight. Cosmetic damage was apparent, but the sight could still be operated normally. Point of impact shift was approximately 3 MOA. The last set of BUIS was the Magpul MBUS. Damage was purely cosmetic and the sight remained fully functional. Point of impact shift was less than 1 MOA. Unlike the other sighting devices, a second drop was performed. Results did not change, and the sight remained functional." Now my personal experience with these is on my M&P15-22 but I'm ordering an additional MBUS for the AR I am building. They are really good quality, just make sure you don't get a PTS sight from a bad retailer.

After building my first AR, I researched the different back up sights available out there. I could have spent a few more dollars on the fancy CNC'd pieces, but after so many favorable reviews, in addition to the price, I thought I would give it a shot. When I got the sight, I inspected it for manufacture defects, tested operation and read the info sheet that came with it. Inspection showed no visible flash from the molding process. All edges were nicely rounded, which shows forethought into snagging on gear or clothing. Knobs are clearly marked and easily turned. The spring action is sharp, actually startled me with it's force, but I don't see it as being a problem. Mounted quickly and easily, but it's Picatinny and that's kind of the point. Manipulating it with my hands it feels solid and well built. Such is the quality that I won't be "upgrading" it to an aluminum machined sight, there's no reason other than to spend money. The one down, and I hesitate to call it this and I won't take a star off for it, is the rear flip down aperture sight. It's a bit sticky at first, but that is easily remedied by usage. The tab to flip it up or down is kind of small and if you don't have some fingernail, difficult to flip. But really, if you're in that much of a hurry to flip from far to close and vice versa, you've probably messed up some how. This is a backup sight for if my optics die. It folds down flat and out of the way. It seems to be rugged enough that it will stay tucked and out of the way until I really need it and work well.

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!

物はマグプルでしかも実銃用なので信頼性はピカイチです。しかしながらカラーを間違って買ってしまいました。