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Mil-Spec Back-up Iron Sight (B.U.I.S)

4.8 4.8 out of 5 stars 658 ratings

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About this item

  • Adjustable up to 600 meters
  • Spring loaded sight aperture

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Product Description

Matech Back Up Iron Sight Sight Picatinny Black Ranging Aperture BUIS

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Technical Details

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MaTech

MaTech Mil-Spec Back-up Iron Sight (B.U.I.S)


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Important information

Legal Disclaimer

Must be 18 or over to order. Buyer assumes all responsibility for safe installation and use of product and seller is not liable for misuse of product in any way shape or form. Unload all weapons before installation and during sight adjustments.

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Customer reviews

4.8 out of 5 stars
4.8 out of 5
658 global ratings

Customers say

Customers like the quality, durability, ease of use, and adjustability of the AR-15 rear sight. For example, they mention it's a well-made sight, holds solidly to the rail, and is a professional grade iron sight. That said, they appreciate the elevation adjustment capability.

AI-generated from the text of customer reviews

76 customers mention71 positive5 negative

Customers are satisfied with the quality of the scope. For example, they mention it works great, is durable, accurate, and is one of the best BUIS you can buy. Some say that it's an excellent choice for a back-up sight and performs under the harshest of conditions.

"...not have a larger peep hole for night shooting it functions perfectly for its intended purpose of a back up sight...." Read more

"Excellent product and very fast shipping." Read more

"...mbus pro (metal) sights… but this is literally battle proven and works very well. I was building an M4 clone and this was the last thing I needed...." Read more

"It works well.A thing I like to add is that to zero this, it depends on your barrel length...." Read more

73 customers mention64 positive9 negative

Customers like the durability of the sight. They mention it's well-constructed, holds up to abuse, and is built like a tank. The detents are smooth and precise, and it'll perform well under any conditions. Overall, customers are satisfied with the long life and accuracy of this product.

"Very durable" Read more

"...Like others have said, it’s the real deal, definitely not a cheap knockoff. Came quick and in the official MaTech packaging, just like in store...." Read more

"...It's solid platform and easy of use and it's ease of sighting in are a real plus. It is rugged and that explains why the military uses it...." Read more

"...It is sturdy (all metal), and pretty compact...." Read more

73 customers mention69 positive4 negative

Customers are satisfied with the sight. They mention it's well-made, a genuine MaTech sight, and a good solid rear sight that stays on the weapon no matter what. They also say it looks great and functions properly. Some say that it'd be one of the best sights out there for the money.

"...The sight looks great functions properly and was shipped fast (received in 3 days). After installing on my Colt LE 6920 it was easy to zero...." Read more

"Solid sight! If you’re on the fence about it, just buy it. Like others have said, it’s the real deal, definitely not a cheap knockoff...." Read more

"...Overall, pretty good sight, and would give it five stars if the innovation flaw I mentioned were fixed." Read more

"It is easy to become a fan of this well made sight for the AR. This is a great sight to co-witness with optics or just as stand alone iron sights...." Read more

30 customers mention30 positive0 negative

Customers find the product simple and easy to use. They say it comes with clear instructions and takes little effort to find point of aim quickly. They also say it zeroed per the directions and was extremely accurate. Customers also mention that the adjustable windage and ranging keep it pretty simple.

"...After installing on my Colt LE 6920 it was easy to zero. I recommend this as a great back up sight for anyone using optics on their AR style rifle...." Read more

"...It's solid platform and easy of use and it's ease of sighting in are a real plus. It is rugged and that explains why the military uses it...." Read more

"...There are great aftermarket sights that are tougher, lighter, less complex, and do it all cheaper than this item, but if you are nostalgic for the..." Read more

"...Takes little effort to find point of aim quickly and is as accurate as the shooter's ability...." Read more

27 customers mention24 positive3 negative

Customers like the adjustability of the sporting goods. They mention that it has plenty of adjustments, including the elevation adjustment capability. They appreciate the well-marked ranging adjustment, which allows them to quickly adjust to known ranges to put effective rounds on target. The back-up iron sights allow them to adjust for distance. They also say the sight is sturdy, easy to use, and well made. Customers also say that the ranging adjustability is perfect for long range shooting.

"...The thing I love about this BUIS is that it includes windage and range adjustments...." Read more

"...ProsElevation adjustments are niftyGood size peep for nose to charging handle shooters..." Read more

"...The ability to "dial in" your range (from 200m-600m) is a great feature, and I have had really good success with multiple loads hitting where they..." Read more

"...price, how well it functions, and the fact that you get the added feature of ranging, makes this sight my choice...." Read more

22 customers mention22 positive0 negative

Customers are satisfied with the value of the sporting good. They mention it's a great product for the price, cheaper than other metal sights, and just as robust. Some say the seller is awesome and the product is just as described.

"...item is the real Army and AF rear sight for issue M4s, and is priced accordingly...." Read more

"...the price was great, almost half of what you should be paying, and the delivery was ahead of schedule. Great Buy." Read more

"...Good buy, no regrets." Read more

"Professional grade iron sight, very decent price as I have seen them as much as $150 elsewhere...." Read more

19 customers mention19 positive0 negative

Customers are satisfied with the consistency of the sporting goods. They mention that it is accurate, allows the rifleman to be extremely precise, and has a small foot print. The construction is solid and the machining is extremely well. Overall, customers are happy with the product's consistency and accuracy.

"...These sights have a small foot print and allow the rifleman to be extremely precise with their carbine or rifle. I can not recommend these enough!" Read more

"...These are reliable, durable, accurate and IMO one of the best BUIS you can buy...." Read more

"...it is a precision piece of equipment...." Read more

"...little effort to find point of aim quickly and is as accurate as the shooter's ability. Will be buying another one for my son's M4A1 clone build." Read more

18 customers mention13 positive5 negative

Customers like the fit of the scope. They mention that it fits nicely under an Acog, is accurate, and small. Some say that it's sturdy, compact, and dummy proof. Overall, most are satisfied with the fit and functionality of the product.

"...The matech is just like the normal a2 sight but just compact and can easily fold away.I also like how you can use a optic with this...." Read more

"...ProsElevation adjustments are niftyGood size peep for nose to charging handle shooters..." Read more

"...Allen wrenches but THE Screw stripped and rail holder is cheap and made to small...." Read more

"...These sights have a small foot print and allow the rifleman to be extremely precise with their carbine or rifle. I can not recommend these enough!" Read more

Will be buying another
5 Stars
Will be buying another
Put this BUIS on my Aero Precision service rifle clone (special edition model M16A4 lower receiver with safe/semi/burst markings) with a 20" chrome-lined lightweight barrel and shot it for the first time this weekend (4/29/17). The sight zeroed in 6 rounds and shot less than 1" groups from 25 meters and 2" groups from 100 yards from the bench. Happy with the quality of this sight, as the windage and zero adjustment controls only move with deliberate action and make audible clicks with positive feel. Takes little effort to find point of aim quickly and is as accurate as the shooter's ability. Will be buying another one for my son's M4A1 clone build.
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