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

This sight is exactly the same one that the US Army uses on their M4/M16 A4 models with the Aimpoint sights. Just like the one i had 2 different times while deployed to Iraq. 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. I recommend this as a great back up sight for anyone using optics on their AR style rifle. However it does not have a larger peep hole for night shooting it functions perfectly for its intended purpose of a back up sight.If anyone wants to know how to zero the sights on an AR to 300 meters on a 25 meter target with this sight and a standard fixed front sight keep reading.I would recommend you mount the sight as far back as possible on the rifle as to not obstruct the use of the charging handle (since the peep hole is so small you will be able to see more through it). First you need to perform what we call in the Army “Battle sight Zero.” Use the windage knob to move the center mark of the sight left or right to center of the hash mark of the base and placing the range lever on the line below the 300 meter mark on the sight, once zeroed use the range value that is appropriate to your target range. Then use an unfired round or a front sight adjustment tool or a punch to adjust your front sight post so the base of the post is flush with the back of the front sight post base. I then recommend zeroing it at 25 meters using a M4 zero target you can download save and print from [...] . When looking through the sight to obtain a steady sight picture (when looking through the rear sight you should center the tip of the front sight post in the circle, you can reference the V shape of the sight post base to how it fits in your sight picture just keeping in mind you need to use the exact same sight picture every time to be as accurate as possible) I recommend placing the tip of your nose on the back of the charging handle. The recoil of an AR is so light it does not hurt trust me if fired thousands of rounds through them and you will be just fine. Then aim center mass of the target and fire 3 rounds. Using a pen draw a triangle using all three holes. And use the center of that triangle as the point to start making your adjustments. If your grouping is more than 2 inches apart you need to use the 2 that are closest to each other and use the center of them. If you have a shot that is far up or down it is from your breathing I recommend shooting when you have fully exhaled and wait to inhale once you have fired. If the shot is to the right or left your more than likely pulling the trigger and not squeezing it. (What I mean is you should not jerk the trigger back you need to slowly squeeze it and let the trigger do its job of firing the rifle and not you). Just repeat this step until you can put 6-9 rounds through the circle in the center of the target. If you are having further grouping problems I would recommend doing what we call “Dime Drills” where take up a sight picture place a dime on the barrel (do not place on the bird cage but the actual round part of the barrel) and dry fire the riffle over and over until you can pull the charging handle, sight the riffle, and squeeze the trigger without making the dime fall off.Hope this is helpful!

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.

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.

Cut my teeth on the A2 carry handle rear sight, but these are profoundly easier to set up and use. sight picture is pretty standard to the A2, maybe even a little smaller which is great for precision. I took this out, zeroed it at 25 meters and immediately started walking it back, 100 meters, 300 meters, 400 meters, and I was making hits via adjustment 9/10 times on a 8"x12" plate. adjustments works just fine on a 20" using M193.I plan to replace all of the other rear irons with these. Magpul MBUS or these other polymer, non adjusting elevation irons dont even hold water compared to the Matech. 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!

It’s a Matech sight. It works for me as a primary or backup. I have another one that I’ve used for over 12 years and I really like the design. Fast delivery time as well.

I like this sight for its relatively strong, tough construction - it's clearly intended to be 'soldier-proof'. (Having worn a uniform myself, I appreciate that!) The aperture is a bit small for my aging eyes, but a quick pass with a drill bit of the appropriate size, followed by a touch-up with a bit of black paint, sorted out that problem in no time.

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!