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

$138.74$184.99Save $46.25

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SKU: AT3-DELTA-3X UPC: 5060748422620

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Product description

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

Customer reviews 15

id0l Verified buyer
Bought one of these Deltas on sale while I was testing a Sig Juliet 3 (full size) on my FX-9. The Delta has noticeably better eye relief, a more forgiving eye box, and was less than half the price of the full size Juliet 3. If there is a difference in glass between the two, it's minor enough that I really cant tell. The hand-adjustable turrets on the Delta are much more convenient than adjusting the Juliet 3 turrets, which were EXTREMELY stiff. The Deltas are much easier to turn by hand, so you can center your dot quickly and easily, but not so easy to turn that you are going to lose it's "zero" easily. The optic even has a pretty nice rubber overmold to protect it against bumps, scrapes, or drops. The ONE thing I would recommend to AT3 that would make this magnifier combo even better is to have the mount hinge positively lock when the magnifier is engaged. It is not bad, but it seems like a simple friction/spring lock and could use at least some more resistance (positive lock would be better, though). The Juliet's PowerCam QR mount is just fantastic all around. I find it funny that the single thing I liked with the big Juliet 3 over the Delta was the mount. I can deal with the slightly bulkier nature of the Delta mount, it's built like a tank, but getting some more positive lock when the magnifier is engaged would be great. Great that it is QD though and easily adjustable. All in all, the Delta is a fantastic value here versus more expensive options, and actually potentially better than those other options even disregarding the price differential.
bakhtiar_68 Verified buyer
I have some products from this company and all I want to say is everything is amazing quality, great product, could not be happier.
thank you AT3
keep up the good job
Jerome Verified buyer
Great product it was very easy to mount basic instructions were easy to follow on how to get the best view possible

AT3 Tactical · Thanks for the great feedback, Jerome! We're glad to hear the magnifier was easy to mount and that the instructions helped you dial in the perfect view. Enjoy the setup!

jesselyearta Verified buyer
So far, pretty good. Easy to install with a solid locking foot base. It’s sturdy and not as heavy as I expected. It snaps into the “in-use” and “not-in-use” positions smoothly—hopefully that mechanism doesn’t loosen over time. A positive lock for the “in-use” position would be a nice future improvement, but for the quality and price, you really can’t beat it. Looking forward to putting it to use.
ethanjeffryes Verified buyer
Fantastic very high quality can’t beat it for the money in my opinion

AT3 Tactical · Thank you so much for your kind review. We're thrilled to hear that you are pleased with the quality of our AT3™ DELTA 3x Red Dot Magnifier with QD Flip-to-Side Mount. We strive to provide top notch products at affordable prices, and we're glad that you feel we have achieved that. Thanks again for choosing our product!

slansing Verified buyer
Solid and easy to install and uninstall. Great fit on my DB-15
Came with a lower Co-witness plate to match the level of my green dot.
Easy to lean out of the way so as to only use the green dot.
Clear focus and good magnification.
I'm satisfied with the choice that I made.
Thanks AT3Tactical.

AT3 Tactical · Thank you for taking the time to leave us a review! We're glad to hear that our AT3™ DELTA 3x Red Dot Magnifier was able to add the perfect amount of magnification for your DB-15. Our flip-to-side mount is designed for easy installation and uninstallation, making it convenient for your shooting needs. We're also happy that the lower Co-witness plate was a perfect fit for your green dot. We take pride in providing clear focus and good magnification for our customers. Thank you for choosing AT3Tactical and happy shooting!

ArizonaLoganYT Verified buyer
This magnifier is almost perfect. It feels rugged and durable; it has a rubber cover that feels nicer than bare metal when flipping over; the QD mount is strong but easy to use; it flips and locks with only friction; and it includes a lower 1/3 riser. It does lack some glass quality but only compared to the high end magnifiers like those from EOTech and AimPoint. The price was too similar to the Holosun 3x, so the only reason I chose this is for the extra 0.3 inch of eye relief (I can't say for sure that I notice the difference). So, with all that said, it seems very good for the price.

AT3 Tactical · Thank you for taking the time to leave a review for our AT3™ DELTA 3x Red Dot Magnifier! We are happy to hear that you find it to be almost perfect and appreciate its durability and ease of use. We understand that there may be some differences in glass quality compared to higher-end magnifiers, but we are glad to know that it still meets your needs at a more affordable price. Thank you for choosing our product and for your feedback!

ryan.snyder Verified buyer
Great magnifier for the price. It's a bit long compared to my Sig juliet micro but otherwise comparable to others in sub $300 category. Also this magnifier shares the eotech magnifier footprint and will fit mounts that support it. I run it on a Unity FTC omni with zero issues for months now.
asgraham Verified buyer
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.

AT3 Tactical · 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

gil.youngblood Verified buyer
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 screw so during handling could lose zero with rds

AT3 Tactical · 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.

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Warranty & returns

Backed by the AT3 Lifetime Warranty!

90-day no-hassle returns

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.

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