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AT3™ 45 Degree Offset AR 15 Back Up Iron Sights - Rapid Transition BUIS

AT3™ 45 Degree Offset AR 15 Back Up Iron Sights – Rapid Transition BUIS


MSRP: $54.49


Out Of Stock

Lifetime WarrantyOn All AT3 Brand Products

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

Dead-on accurate 45 degree AR 15 iron sights at a fraction of the cost of the “big brands”


  • Allows the user to quickly switch from optics to iron sights by slighly rotating the rifle
  • Universal – mounts to any picatinny rail system that is at the height of the flat top upper
  • Works best for right-handed shooters, but can be used left-handed
  • A2 style sights – adjustable front sight post height, and dual aperture rear sight with windage and elevation adjustment
  • Backed by the Lifetime AT3 Warranty


  • Material: 6061 aircraft aluminum
  • Finish: Hardcoat Anodized (black)
  • Weight: 3.8oz (Rear) & 1.4oz (Front)
  • Mounts to any Picatinny rail
Save $3.95 when you add a Wheeler Front Sight Adjustment Tool for only $8 using the dropdown above! This tool makes it much easier to zero your sights!

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Customer Reviews

Based on 155 reviews
AT3 45 degree offset BUIS set

I was looking for some offset BUIS because I just put a nice Nikon optic on a new upper and with the eye relief the scope required no folding sets would work in the space available. I was about to pull the trigger (see what I did there) on some 3 figure sights when I found this set. Wow, am I ever glad I did. Mounting is simple and secure, the build quality is great and the real kicker is the windage and elevation being adjustable on the rear sight!
I may just have to pickup another set or three.

AT3 45 degree off set sights

I have a Kel-Tec RFB-18 and a Kel-Tec RDB-17. A while back I purchased two AT3 Leos (red dot w/laser) and mounted on the Kel-Tecs, they work great. Then I ordered two AT3 45 degree off set sights for the Kel-Tecs. Very easy to mount, and seem to be of good quality. But I have not had them to the range yet, will do when it warms up and the snow goes away. Shipping was very fast. I am pleased with their products and service.

Thanks for sharing your feedback. We're so glad you're satisfied with your purchase. Cheers!
I am extremely happy with these

I just finished building my .458 SOCOM from scratch. I searched for metal offset sights for awhile before coming across these. I kept searching cause all the other sites were over $150 per set. For the price of these I would buy them over and over! Sturdy, adjustable, and well within the budget. The peep holes are outstanding as well. The only thing I can't give a review on is how long they hold up and if they can take the beating of being in the woods, but I'm sure they won't disappoint! Great product!!

Thanks for sharing your feedback, Chris. We're glad you're satisfied with your purchase. Cheers! - AB
Totally Fast

Super Quick Point on Target a Quick Cant Of The Weapon and on Target Great Investment.

Thanks for choosing AT3, Dennis. We're you liked it. Cheers! - AB
Great 3 gun offset sights

I had been looking for a great option for offset sights on my 3 gun rifle and stumbled upon these. I will admit I upgraded them with a fiber optic front sight post which is amazing. The sights are well made and quite durable trust me I chuck my guns in the dump barrels harder than you would expect sometimes. It took a while to want to do this review, I had to know if they would hold up to the abuse that we put them through. I can say that I don't think you can get a better more durable set of offset iron sights at this price point. My only complaint if you could even call it that is the front sight came and the finish on the mount was a bit messed up but it in no way affects the durability or strength of these. My competition guns are not show pieces as seen by how they get thrown around so this didn't bother me in anyway. Hopefully this helps someone who was like me trying to compare and find the best option, in my opinion you will be completely satisfied and glad you got these. I will try to add pictures later if possible.

Thank you for such detailed feedback, Ron! We're glad to hear that you're satisfied with your BUIS. We really try our best to deliver high quality products that won't break the bank. -- LM