Open Box Return -AT3™ DELTA 3x Red Dot Magnifier with QD Flip-to-Side Mount
or 4 interest-free payments of $34.69 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
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 ManualCustomer reviews
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Questions & Answers
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Warranty & returns
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.