--- product_id: 2665750 title: "MaTech Mil-Spec Back-up Iron Sight (B.U.I.S)" brand: "matech" price: "2020 kr" currency: DKK in_stock: true reviews_count: 8 category: "Matech" url: https://www.desertcart.dk/products/2665750-matech-mil-spec-back-up-iron-sight-b-u-i store_origin: DK region: Denmark --- # Adjustable up to 600 meters Spring-loaded flip-up aperture Rugged mil-spec durability MaTech Mil-Spec Back-up Iron Sight (B.U.I.S) **Brand:** matech **Price:** 2020 kr **Availability:** ✅ In Stock ## Summary > 🎯 Lock, Flip, and Dominate Your Aim with MaTech Mil-Spec B.U.I.S. ## Quick Answers - **What is this?** MaTech Mil-Spec Back-up Iron Sight (B.U.I.S) by matech - **How much does it cost?** 2020 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/2665750-matech-mil-spec-back-up-iron-sight-b-u-i) ## Best For - matech enthusiasts ## Why This Product - Trusted matech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Readiness:** Spring-loaded flip-up design ensures rapid deployment when seconds count. - • **Compact & Lightweight:** Low-profile design at just 0.21 ounces keeps your rifle sleek without sacrificing strength. - • **Precision at Distance:** Easily dial in your zero up to 600 meters for unmatched accuracy in any scenario. - • **Seamless Co-Witnessing:** Perfectly pairs with red dot optics like Eotech for a flawless backup sighting system. - • **Battle-Tested Ruggedness:** Built to mil-spec standards, proven reliable in the harshest environments worldwide. ## Overview The MaTech Mil-Spec Back-up Iron Sight (B.U.I.S) is a precision-engineered, spring-loaded flip-up iron sight compatible with Picatinny mounts. Adjustable up to 600 meters, it offers rugged mil-spec durability trusted by military professionals. Lightweight and compact, it seamlessly co-witnesses with popular optics, delivering reliable backup aiming in the toughest conditions. ## Description Matech Back Up Iron Sight Sight Picatinny Black Ranging Aperture BUIS Review: Solid Sight ...Great Performance! - 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. They are on every AR that I own and have built. Shooting buddies have quickly adopted these to their builds as well. 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. These co-witness with the Eotech and other red dot optics. With a log scope and 20 or 22 inch match barrel it works on a 45 degree mount and flip up front sights. Low profile and solid. A Midwest Industries flip up front sight mates up nicely. In Afghanistan I saw these on hundreds of rifles in daily use and they perform under the harshest of conditions. Brush the dirt, dust and mud off and keep on going. I have seen a few rust slightly but that was poor maintenance. Clean them and oil them lightly after exposure to the elements and these will hold their point of aim and be good for a lifetime. Review: Perfect Sight - Probably the best back up rears available based on price, size, and functionality. I zeroed at 25 and then flipped to the 200 setting and was hitting plates with no issues using an A2 front sight. It is sturdy (all metal), and pretty compact. Distance switch is firm without being hard to adjust so no risk of unwanted selection change. Be aware that you may need to be careful if you're using a scope+mount as your primary sight with this as the backup. The standard height mount I used was probably a milliliter from touching the sight. I swapped it out for a tall mount to ensure there was clearance. The only back up irons I've seen that are functionally better are the ones from KAC but those are way more expensive. ## Features - Adjustable up to 600 meters - Spring loaded sight aperture ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002E6SXN4 | | Best Sellers Rank | #194,954 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #537 in Gun Sights #677 in Hunting & Shooting Gun Stock Accessories | | Brand Name | Matech | | Color | Black | | Compatible Devices | Rifle (Picatinny Mount Compatibility) | | Customer Reviews | 4.7 4.7 out of 5 stars (691) | | Item Weight | 0.21 Ounces | | Magnification Minimum | 1 x | | Manufacturer | Matech | | Material Type | Iron | | Mounting Type | Picatinny Mount | | Night vision | No | | Product Style | Functional | | Reticle Type | Post or Peep | | Sport Type | Archery | | UPC | 757183266821 121227427347 610242000555 133588902043 956263181416 | ## Product Details - **Brand:** Matech - **Color:** Black - **Compatible Devices:** Rifle (Picatinny Mount Compatibility) - **Item Weight:** 0.21 Ounces - **Magnification Minimum:** 1 x - **Material:** Iron - **Mounting Type:** Picatinny Mount - **Night vision:** No - **Sport:** Archery - **Style:** Functional ## Images ![MaTech Mil-Spec Back-up Iron Sight (B.U.I.S) - Image 1](https://m.media-amazon.com/images/I/410xzjvOFJL.jpg) ## Questions & Answers **Q: Is this a genuine MaTech or an airsoft copy?** A: It's genuine, she holds zero just fine and is rock solid. **Q: What is the best front sight to match with this?** A: I have a GG&G 1281 Flip Up Front Sight. They work well together. Make sure that if you go that route, pick the sight that fits what your gun has. Some gas blocks are lower than the plane of where the rear sight mounts. If that's the case, choose the one that specifies "for gas block mounting." Mine happens to be the same plane all the entire length of the rifle, so this one worked fine. It's all aluminum and matches the finish on my rifle very well. Flip ups are nice when you opt to run optics also. Likewise, for red dots, it can cowitness if desired. A good red dot will not require a cowitness. The sight pops up with authority and locks in place. Once locked, it's very solid and steady. To fold, just press the button once more and fold it down...again solid engagement. There are many other sights to choose from. Some excessively high dollar ones that do the same job. As a Soldier with over 24 years experience with this particular platform and various sights and optics, as long as it's zeroed properly and remains undamaged, it'll perform better than the shooter for years to come. The front sight tool that this sight uses is the four prong one. For only a few bucks, it's worth buying it as well. The other option is to use a nail or the tip of a bullet to depress and move the sight as needed...usually causing little scratches where the tool does not. Hope this helps. Hit me up if you ever have more questions that I may possibly have an answer to. **Q: Will this work on a Magpul (not the gasblock version)** A: Yes **Q: Does anyone know what grain (5.56) bullet matech intended to be used with the sight in order for the elevation adjustment to work properly?** A: For or all practical purposes, up to 500 meters it will work for all NATO ball ammo (M193, M855 and even M80). Though it is technically calibrated for 62 grain 5.56 NATO SS109 projectiles, you will not see any real world difference if you use it with 5.56 NATO M193 or 7.62 NATO M80, since the difference between the three rounds drop at 400 meters is only four inches between them. Which is why it is an excellent back up sight. FM 3-22.9 RIFLE MARKSMANSHIP M16-/M4-SERIES WEAPONS 5-89. The M16A2/A3/A4 rifle and M4/M4A1 carbine fire both M193 and M855 ball ammunition with little difference in accuracy to a range of 500 meters. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Solid Sight ...Great Performance! *by Z***W on March 25, 2017* 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. They are on every AR that I own and have built. Shooting buddies have quickly adopted these to their builds as well. 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. These co-witness with the Eotech and other red dot optics. With a log scope and 20 or 22 inch match barrel it works on a 45 degree mount and flip up front sights. Low profile and solid. A Midwest Industries flip up front sight mates up nicely. In Afghanistan I saw these on hundreds of rifles in daily use and they perform under the harshest of conditions. Brush the dirt, dust and mud off and keep on going. I have seen a few rust slightly but that was poor maintenance. Clean them and oil them lightly after exposure to the elements and these will hold their point of aim and be good for a lifetime. ### ⭐⭐⭐⭐⭐ Perfect Sight *by S***A on November 11, 2019* Probably the best back up rears available based on price, size, and functionality. I zeroed at 25 and then flipped to the 200 setting and was hitting plates with no issues using an A2 front sight. It is sturdy (all metal), and pretty compact. Distance switch is firm without being hard to adjust so no risk of unwanted selection change. Be aware that you may need to be careful if you're using a scope+mount as your primary sight with this as the backup. The standard height mount I used was probably a milliliter from touching the sight. I swapped it out for a tall mount to ensure there was clearance. The only back up irons I've seen that are functionally better are the ones from KAC but those are way more expensive. ### ⭐⭐⭐⭐⭐ fully adjustable ranging rear sight, easy to use, well made, I love it! *by L***R on March 12, 2013* Awesome ranging rear sight for a picatinny rail, this is the best that I've found that adjusts for distance of a .223. The rear post with the peep flips up and locks into place firmly. The sight has a large lever on its side that you can rotate to distances marked on a scale, from 100 to 600 yards. As you rotate through the scale you can see the post with the peep sight move slightly up and down. this rear sight is made of steel and the parts are clean, and well machined. it is a precision piece of equipment. For the price, how well it functions, and the fact that you get the added feature of ranging, makes this sight my choice. If all you want is close range you may not need a sight, but if you want to reach out there and touch something, with accuracy, this is the sight for you! ## Frequently Bought Together - MaTech Mil-Spec Back-up Iron Sight (B.U.I.S) - Streamlight 88066 ProTac Rail Mount HL-X 1000-Lumen Multi-Fuel Weapon Light with Remote Switch, Tail Switch, Clips, and CR123A Batteries, Box, Black - Sig SauerSOR71001 Romeo7 1x30 M1913 2MOA --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/2665750-matech-mil-spec-back-up-iron-sight-b-u-i](https://www.desertcart.dk/products/2665750-matech-mil-spec-back-up-iron-sight-b-u-i) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-04-25*