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AT3™ DELTA 3x Red Dot Magnifier with QD Flip-to-Side Mount

SKU: AT3-DELTA-3X

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The DELTA has better glass clarity, longer eye relief, and an excellent QD mount!

The DELTA is AT3’s new red dot magnifier, boasting a long 3 inch eye relief, a broad field of view, and enhanced clarity for making accurate, long-range shots with your red dot sight. This magnifier works with any red dot sight with absolute or lower 1/3 cowitness using the included spacer, making it perfect for enhancing your AR-15. Plus, you can swap this magnifier between rifles easily with the included quick detach mount, with a ratcheting adjustment that ensures a tight, secure fit on your rail.

We recommend pairing the DELTA with our ALPHA red dot sight, for a fully featured, modern red dot and magnifier setup. You can get the ALPHA and DELTA as a set here, with a bundle discount to enhance your rifle, and prepare you for any shot from point blank to 500 yards or more!

Better Eye Relief and Sight Picture

  • A full three inches of eye relief ensures you’ll have a clearer view of the target, even with backup iron sights installed!
  • Multicoated glass gives you a more crisp view of your target, with better light transmission and definition.
  • 38 foot field of view gives you a clear picture of what’s around your target, with a forgiving eyebox for head movement.

Flexibility Between Rifles

  • The Quick Detach Mount is our best yet, with an audible ratcheting adjustment for tight, consistent installation.
  • Switch the Delta between multiple rifles with the fast QD lever, and ensure your red dots have magnification when you need it.
  • Out of the box Absolute Cowitness height – and with the Cowitness Spacer, Lower 1/3 Cowitness for even more optics compatibility.

Durable and Rugged

  • Solid steel lockup in the mount keeps the magnifier secure without the need for a release button or lever.
  • Rubberized shroud keeps the magnifier protected from bumps and scratches in the field.
  • Durable enough to handle recoil from high caliber rifles, shotguns, and even .50 BMG. Yeah, we went there.
  • For anything else, you’re covered under AT3’s Lifetime Warranty. If there’s an issue, we’ll take care of you.

Inside the box

  • DELTA Red dot magnifier with QD Mount
  • Cowitness Spacer
  • Instruction sheet
  • Lens cloth
  • 3mm Allen Wrench
  • Longer Screws for Spacer

Specifications

  • Magnification: 3x
  • Objective Lens Diameter: 20 mm
  • Height: 1.43inches/36.5mm from the base to center of the optic (Absolute Cowitness)
    • With the use of the Lower 1/3 Cowitness spacer, height is 1.57in
  • Eye Relief: 3.07 inches/78.2mm
  • Exit Pupil: 6.7mm
  • Field of View: 7.28°/38.3 ft @ 100 yds
  • Length: 3.98 inches/101mm
  • Weight: 12 oz. with mount
  • Optics Coating: Fully multi-coated
  • Waterproof Rating: IPX7
  • Housing Material: 6061-T6 anodized aluminum
  • Finish: Hardcoat Anodized
  • Included in the box: QD flip to side mount, 3X magnifier, Cowitness spacer with mounting screws, Tools, Lens Cleaning Cloth

DELTA Instruction Manual

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

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

This includes AT3 Red Dot SightsHandguardsIron 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.

Customer Reviews

Based on 7 reviews
86%
(6)
14%
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A
A. Graham
Perfect addition!

I just received my AT3 Tactical Delta 3x Red Dot Magnifier and...WOW! Being left handed, I made sure that this could be configured properly and then pulled the trigger (pun intended)!
After removing my red dot so that the magnifier could be mounted, I reinstalled the red dot and did an initial test in my garage. I can't wait to get this to the range!!! Extremely well made and easy to install.

Thank you for your review of our AT3™ DELTA 3x Red Dot Magnifier with QD Flip-to-Side Mount. We're ecstatic to hear that it was a perfect addition to your setup, especially as a left-handed shooter. We take pride in creating high-quality and user-friendly products, and we're glad it met your expectations. Happy shooting and stay safe! - The AT3 Tactical Team

A
Andrew Perez
Should of boughten it sooner!

First of all, the quality of the magnifier and feel is unreal. It feels super sturdy. FOV is amazing and really gives you a clear picture of the red dot. The flip motion is such a solid feel, does not feel flimsy whatsoever and having no button or pull back feature to flip back and forth makes it so worth it!
The 1/3 co-witness riser is perfect for having a flip up iron sight, fits over it perfectly. You can still use the flip up sight with the magnifier flipped to the side. Definitely happy with the AT3 Delta 3x magnifier!!

Currently running a Vortex Strikefire 2 but it's a bit long so I'll be ordering the AT3 Alpha Micro red dot to shorten up the top half, especially if you don't a free-floating handguard.

G
Gil Youngblood
Good optics

Went on easy zeroed easy to rd-50 but not sure if it will be a problem but windage & elevation once set there isn’t a way to lock those settings like cap or a set **** so during handling could lose zero with rds

Thank you for leaving a review for our AT3™ DELTA 3x Red Dot Magnifier. We're glad to hear that it went on easy and zeroed easily to your RD-50. We understand your concern about the windage and elevation settings not having a lock feature. We will definitely take note of this for future improvements. Thank you for bringing this to our attention and we hope you continue to enjoy your magnifier.

C
Charlie
Easy Install & Works

Install took seconds. Quality is up there with magnifiers that are 5x the cost.

Great review! The AT3 DELTA 3x Red Dot Magnifier with QD Flip-to-Side Mount is a great quality magnifier that is easy to install and works great. We highly recommend it!

J
Joshua Farkash
Where Quality meets Price

First thing you notice out of the box is the quality and rigidity of this magnifier. I'd argue its better in that regard than its Eotech counterpart. Glass seems to be high quality and it's noticeably shorter than other 3x magnifiers. Just about ready to go out of the box! Someone clearly put a lot of time and money into this. I will be running it on my Tavor X95 but seems great for anyone running a red dot on their rifle

Thank you for the great review of the AT3 Delta 3x Red Dot Magnifier! We're glad to see that you're happy with the quality and rigidity of the magnifier, and we're excited to see how it works on your rifle.

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