AT3 Tactical Flip Up Backup Iron Sights (BUIS) - Front & Rear Set - Same Plane or Gas Block Height
You will receive fast, free shipping for all orders over $35
Shipping cost is $5.50 for orders under $35. We ship with UPS and USPS.
Most orders ship out within 24 hours
You will receive tracking information immediately at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses.
We have a 90-day no-hassle return policy. We pay return shipping.
If you need to request a return, contact us at firstname.lastname@example.org and we will send you a return label
After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.
Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at email@example.com. We may direct you to pursue your warranty claim directly with the manufacturer.
Your satisfaction is our #1 priority
If you're dissatisfied with your purchase, in any way, please contact us at firstname.lastname@example.org - we will do our best to make it right.
- Brand: AT3 Tactical
AT3 Tactical Flip Up Backup Iron Sights (BUIS) provide dead-on accuracy, superior durability, and the best value for AR-15 iron sights!
Available in 2 types:
Gas Block Sights - for mounting on gas blocks that are lower than the upper receiver (usually about 1/4" lower than the upper receiver rail)
Same Plane Sights - Made for mounting on quad rails or other rails at the same height as the upper receiver
- A2 style sights - adjustable front sight post height, and dual aperture rear sight with windage adjustment
- Easy to install and sight in. Reliable and accurate.
- Optional - Save $3.95 when you add a Front Sight Adjustment Tool for only $8. This tool makes it a breeze to zero your sights!
- Also check out our 45 Degree Offset Iron Sights - great for rapid transition between short and long range targets!
- Material: 6061 aircraft aluminum
- Finish: Hardcoat Anodized (black)
- Gas Block Sights: 3.3oz (Rear) & 3.0oz (Front)
- Same Plane Sights: 3.3oz (Rear) & 2.6oz (Front)
- Packaging: PE Bag
- Mounts to: Picatinny rail
- Height when flipped down: .75" (front), 1" (rear)
Recently Viewed Products
Fast delivery. The sight are great. Everything just like advertised.
Haven't had the chance to shoot with these yet. They mount very solid and seem very durable. They have windage and elevation settings that feel like they will hold solid. Overall very happy with purchase. Shipping was also very fast.
These sights were just what I needed and the order was shipped fast. I am most impressed by the friendly service and I look forward to doing business with AT3 again.
Glad that I found these sights, just what you need when your railed front gas block is lower than your back rail.
That fit perfectly and wrong like ou want them too love them
I bought the gas height version and it fits my Stag 15 perfectly. I tested it in the outdoor range at 35 yards choosing small hole peek sight at the rear and was able to hit two inch group. Very pleased thank you AT3 for this wonderful affordable sights so we can defend ourselves without break a leg and arm to begin with.
Perfect fit, function and price. Dead on accuracy. Wonderful price. Superb delivery time. Would recommend these to anyone for back up sights.
I have been using firearms since I was a young teen. These sights are dead on and sit perfect on my gas block. I love Magpul and was hesitant on this purchase but am 100% satisfied. I won't take this opportunity to brag on owning a $1000 dollar firearm...
In putting together a "truck gun" I didn't want to spend $100+ on sights. AT3s BUIS fit the bill for the need. I ordered two sets. One set went on and functioned as expected. The other rear sight would flip down every time the firearm recoiled. I sent an email to AT3 asking what needed to be done. Laura got back to me in a timely fashion and said she would send another one out immediately and no need to send back the defective one.
That is good customer service from a company that stands behind their products.
Just installed the new sights and very impressed with accuracy and quality. Worked as well as any Troy without the price tag.
AT3 was terrific work with. Easy to order, great prices, quick delivery. Getting ready to order more items.
The rear sight is cocked in both directions - when looking from behind the sight and from above looking down on the sight; it is most noticeable from above. I never used the rear sight but I did use the front. I put the front sight on the gas block and used a Magpul rear sight on the upper receiver. Apparently the "base height between the brands is not the same because I could not get the rifle to zero; windage was perfect; elevation was high by a country mile. I gave up on using a gas block sight set up and bought a set of drop-in rails and mounted the Magpul front sight on the rail. I compared the AT3 front sight to the Magpuls by installing the AT3 in front of the Magpul front sight and found that the AT3 front sight was not even in the center- it was off to one side. Oh well, as they say you get what you pay for. I guess it's my own fault for putting forty dollar sights on a thousand dollar rifle. AT3's site says if your not satisfied return the item. I'll be doing just that. I only selected one star because I had select at least one.
I bought this set for back up sights to use with a red dot, perfect set at a great price. I bought a different set for another gun and there was a small issue with the locking mechanism and the customer service was outstanding. The company responded right away and resolved the problem. The service from this company will make me a loyal customer
The front sight was a little loose on my fire arm but other wise good quality for the money
Very nice sights for the money! Sturdy and well made- and shipping was FAST. Laura included a nice note referencing the credit on the sight tool combination.
Seems okay at first look. Installed and checked with laser bore slighter and may shoot well below point of aim. Have yet to fire weapon and will see where bullet actually impacts at various ranges. They lock down securely enough, but seem a bit loose when erect.
Seen very well constructed and solid. Easily attached to rifle. Only negative is the adjustment for elevation is on the front sight and is very awkward to achieve. Hopefully will not have to adjust again once "zeroed!"
Craftsmanship and finish on the sight set was excellent. The adjustment knob on rear sight works well and feels tight. The only downside is the misaligned/improperly installed spring-loaded latch that holds the rear sight in the up and down position. My sight wobbles and falls out of place easily in the up position.
They were what I wanted. I changed from the A2 sight to a gas block with a rail and needed a taller front sight. The rear sight covers some of the red dot opening when flipped down so I may end up changing that.
Super fast shipping!! Great communications!! Had a small problem that was remedied immediately, without any hassles whatsoever. Definitely recommend this company.
Well made,nice sight would buy again
when my order arrived (very fast since I live in Florida) I could not get the back to zero with the front. I called and Laura took care of my problem right away. I spoke with her on Monday and Friday I had a new front sight in the mailbox. Zeroed them in today (Friday) and they do fine. These are not spring loaded and have to be manually raised but they are made of a high quality, heavy metal that should last. The mounting screws are on opposite sides of the rail once they are mounted which I don't care for. The rear will only function in one direction, and if you mount it backwards the recoil will cause it to close down. This might be a problem for some optics. My red dot and these buis co-witness fine. Thanks Laura for your prompt help!
Sights fit great, speedy delivery with affordable price.
sights fit good and do what they are made to do I don't care much for the large knobs that tighten them to the rail.
I haven't bought it yet am thinking about it but want know if I can swap out the front post with another style. If so then I found my sights.
Although I've not yet mounted either sight, a cursory examination of both reveals their quality.
I'm impressed at how quickly they arrived!
Excellent customer service.
Nearly dead on out of the package.
Excellent products at a reasonable price.
Look good, work good and fit well. Worth the money for sure. Service from AT 3 was great.
Decent Sights,Great Price, Fast Delivery
Very nice sights have not taken to range yet but can't wait to try them out.They seem well made they also have a certain cool factor to them
Awesome I emailed the company ahead of time to see if the a2 sights would work with the trijicon night sight aperture and was told it would..it works flawlessly
The front site is loose and wiggles even after tightening as much as you can. Had to Shem it.
Heavy strong well built
These sights are very well made, have a great fit and are very reasonably priced. Shipping was super fast as well! A+
The title says it all!
I just it them on my M4, I like them so far. The real test will be sighting them in.
I needed back-up sights for a new Adams Arms carbine. Nice product, good deal, shipped quickly, mounted firmly. Thank you AT3
Bought these for my first build. Excellent product. Fast delivery.
Thank you AT3 for fast delivery. A great price for a pair of iron sight. Just in time to mount them on my new rifle.
They're solid, I'll buy this item again in the near future.
Needed a BUIS system for a flat top build. Looked at dozens of options until I found AT3 Tactical. Great, well made product, fit perfectly and securely. Ran a good amount of rounds through the weapon then checked fit...still secure. What's even better, they co-witnessed with my reflex sight flawlessly AND the price is considerably lower than the competition. BUT, best of all is the customer service. This item was out-of-stock with the option to be notified when available. I dealt with Laura who was professional, courteous and has a great sense of humor. As soon as the new stock came in, I was notified. Shipping was immediate. Can't ask for more than that. Good job all around.
No instructions as to swing forward or swing aft mounting. First mounted swinging forward and on first shot both sights folded to the rear from recoil. Turned them around they worked fine. Very little adjustment to sight them ! 1/2 inches high at 100 yards. At first found front sight would not tighten on rail, but found the side clamp was upside down. Flipped it over and it worked perfect. Very fast shipping, sights arrived a day earlier then expected. Great Price and total satisfaction. Thank you.
Very nice folding irons. Very accurate. for the price they can't be beat.
Well made sights. Just wish they had tighter fit when flipped up. But for the price can't be beat.
Probably cannot beat these for the price. Well built but simple. front post was too tall on my upper. Had to trim it a little as the adjustment was bottomed out.
Got these in and put them on. They are great. I had a small issue after I initially installed them with the rear sight being a little loose on my rail. I contacted costumer service and they handled it very quickly and was very friendly. Great products and great company. Will definitely be doing business with this company again.
Got the products in fast, solid pieces which are easily zeroed. Easily comparable to MBUIS and others for at least 50% less. The aluminum instead of polymer is visually pleasing on an "all-metal" AR.
Great product fast shipping
Fits great works great!
Great product, sights went right on, turned on the eo tec and the red dot was sitting on top of the front sight ! No adjustment , can't beat that no way !! Thanks, and will let all my customers at SWANKS GUN REPAIR, know what a good product !! Mike Swank
Good stuff right here
These sights feel very solid and made with good materials, but like many other reviews the rear sight was loose on the rail. I will either have to shim it or find some other way to get it tighter.
good service fast shipping!!
sights are good quality, with positive stops when folding, haven't zeroed it yet but they seem to be high quality so I have no concerns, service and shipping are top notch, look forward to more business with AT3 in the future !
Good sights for the money.
These iron sights are as good as some of the expensive iron backup sights . No problems with these sights, very well made.
for the price and as a pure back up these are great, but not top quality that I would want to use if they were going to be my primary sights.
product as described works well
Haven't shot with them yet...but I now they be awesome I had a pair of their 45 degree iron sights and never missed a lick
Purchased these more for the price after searching the internet and also for being a Midwest company as I live in Wisconsin so wanted to give them a shot. Laura in customer service did a great job in helping me with my order. The only thing I would add to these sights is an up arrow for the front sight post to help when adjusting as some folks may mount them opposite depending on what direction they want them to fold. A little blue Loctite added to the screws when I applied the sights to my rails and no issues staying on. Good positive clicks on rear sight and easy to sight in for someone that has not shot an AR type rifle in over 20 years. Even thought they are not spring loaded flip ups they work great and stay in place when up or down. If this company was a publicly traded stock I would have bought their stock already. Great product, price & service what more can you ask for.
The front and rear sights line up, the front does co witness with my red dot, they fold and unfold without loosening an/or losing center, but the front sight is milled incorrectly so it won't tighten to the gas block picatinny rail, and basically wobbles. I made two shims, slid them in each side, and now it tightens. I was sent a set of same plain sights by mistake, and they were fine, fit and tightened perfectly, but the front was too low(same plain set). Hey, for $34.00 what do you expect? They look to be well made and they are metal, so until they literally fall apart, I'll keep them then be forced to spend $150.00 for a good set. Hopefully, they'll last a few years.
These sights mounted easily and they flip up and down without any trouble. I am happy with the finish of the sights. they are no frills but they don't feel cheap and are excellent for the price.
Unsubscribe does not work
I never heard of AT3 and now i know why. First off both sites were individually wrapped in a bit of bubble wrap. After opening them i was wondering where the packaging was or maybe instructions or even a paper that said AT3 on it but nothing here. My first set of sites and i have no clue how to set them uo so i have to rely on youtube at the range. I purchased the cheap tool to adjust the front site and with no suprise the front post does not move, its stuck where its at and of vourse my rifle is shooting way too low so these sights are no good to me. Id send them back but im not paying shipping gor that so ill sell them outright.
Excellent value. Super-fast delivery. Hitting 3 MOA @ 100yds which is just fine with my eyes. Do what they're supposed to at a price for a set that you would pay for just a front sight from another mfg.
Got these in the mail super fast, you can't beat AT3's customer service. These sights are excellent for the gas block AR setup, and when I went to sight them in they were already dead on. They are really quick to acquire the target, adjust easily, and stay on very well. They'll hold up for my 3 gun matches, which is more than enough for most folks. Fit and finish are excellent as well, definitely better than expected. All in all, excellent value all around!
Sights came quickly and seem to be well made, however rear sight was missing the movable bracket used to tighten it to the rail. Customer service was prompt and sent missing part out the next day. CS also commented that this has been a problem and that they thought that they had caught them all. If you knew that it was a problem why didn't you check each item in stock???
Have yet to go to the range, but will check them out once I get to the range.
Outside of the missing part, so far so good.
Iron sights are great for back ups. Elevation and windage adjustable. Gas block is low profile for a quad rail system, and performs great.
I was disappointed in the overall quality. The sights have to be manually raised and are not spring loaded and don’t lock into place.
Better built than sights that are more expensive
these are very good sights for the money.As they are called they are Back-Up sights.You really dont need anything better than these.Thanks for the quick service.I will buy from again
Haven't shot with them yet, but they seem to be well built and installed easily, and work like they should. These sights are a great buy for the price. I will buy another set soon for my next build.
The shipping was very fast and the sights were easy to install. They lined up great with my red dot and sighted in with ease. Very happy with the service and sights.
all though these sights are Manuel flip up for the money and for use as back up sights with my optics .they are very high quality. please note if you bye a set of these sights also bye the sight adjustment tool for the front sight it makes life a lot easier if adjustments are called for.over all i'm very pleased with this purchase and think you would be too! Bob,Oregon
Solid construction and fitment is great! At3 tactical is a great source for amazing parts at a great price
These really look an work great....Awesome Products "Thanks AT3"
The AT3 Tactical sights fit well and flip down nicely. The rear sights have two apertures; one for distance shooting and the other for close-range shooting. I am going to replace the front sight post with a high visibility post.
They fit perfect and look great on my gun. Im glad i bought these instead of gettin an expensive pair of sights.
Great company! Found this product for less that half the price of others. Got it faster than expected and very pleased with the sights. Will order from AT3 again. Thank you AT3!