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Questions & Answers
Do you have to remove to replace the battery? Expert Answer

No, the Vortex Optics OPMOD Defender-ST houses the included CR2032 battery on top of the optic behind the glass. It can be removed and replaced without having to uninstall the optic.

by Ethan, Gear Expert, March 25, 2025
Is it a RMSc footprint? Expert Answer

No, the Vortex Optics OPMOD Defender-ST uses the Deltapoint Pro footprint. The Vortex Defender CCW (linked below) uses the RMSc footprint.
https://www.opticsplanet.com/vortex-defender-ccw-1x-moa-red-dot-sight.html

by Ethan, Gear Expert, March 25, 2025
Customer Reviews
Helpful Positive Review
Best mid rds out now by mezcalfud, Verified Owner, October 5, 2025
I’m running this STS on several midsize Glock 19/23 size pistols and so far it’s a really good sight. It holds zero, solidly mounted, and just a great dot. I don’t like the tan but nothing a sharpie can’t fix.
1/1 found this helpful
Helpful Positive Review
Great All Around Optic by Ethan, November 14, 2025
This optic is vary versatile. Can fit on most large handgun and monts tight in any rail to add a great low profile, light weight red dot sight.
1/1 found this helpful
Helpful Positive Review
Even the cover is FDE! by jerryb, Verified Owner, March 28, 2025
Vortex pulls out all the stops in terms of setting their customers up for success. It comes with an abundance of mounting screws for every major manufacturer, an MOS plate, rubber cover, special tool, and a 1913 rail mount. No one else does all that....
Read More...
2/2 found this helpful
Helpful Positive Review
The best red dot Vortex has ever produced!!! by Mark, Verified Owner, May 15, 2025
I've had several over the years, all Venoms which were great and still being used. But the Defender especially the "OPMOD" fits my new G19x perfectly, even comes with a tan/coyote plate for perfect match to the pistols color scheme. I also have a bla...
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2/2 found this helpful
Helpful Positive Review
My First Vortex by None, Verified Owner, April 30, 2025
This will be my First Vortex Optic, so I am excited to compare it to my other Red Dot Optics. I think that I will like it, and I might become a New Vortex User.
2/6 found this helpful
Helpful Positive Review
Great Value Red Dot by Optic Guy, Verified Owner, May 21, 2025
The OPMOD Defender-ST is an excellent Red Dot. The glass is clear and red dot is crisp. It works great in all lighting conditions and the motion activation works perfectly. It came with everything needed to mount on a number of different platforms wh...
Read More...
2/2 found this helpful
Read All 50 Reviews

We've got an AWESOME deal for you!

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Color:
Tan
Reticle:
6 MOA
Illumination Color:
Red
Red Dot Sights-Footprint:
Not Applicable

Code: 99-RD-AAEQD-843829145855

MPN: 843829145855

UPC: 843829145855

Blazin' Deal
List: $449.99Save 52%
$217.34

Product Info for Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot

Handguns. Shotguns. Offset on a carbine. Whether running drills at the range or holding the line during rigorous duty use, the all-purpose Defender-ST delivers the toughness, accuracy, and adaptability your challenging world needs.image

Specifications for Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot:

Manufacturer: OPMOD
Color: Tan
Magnification: 1 x
Objective Lens Diameter: 23 mm
Reticle: 6 MOA
Illumination Type: LED
Illumination Color: Red
Eye Relief: Unlimited
Adjustment Click Value: 1 MOA
Parallax: Free
Battery Type: Lithium Ion, CR2032
Length: 1.83 in
Weight: 1.48 oz
Red Dot Sights-Footprint: Not Applicable

Features of Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot

  • Delta Point Pro Footprint
  • Window Size 23mmx20mm
  • Large Viewing Window
  • Aspherical Lens
  • Motion Activation with 10 minute Auto-Shutoff
  • ShockShield Polymer Insert
  • Fast-Rack Texturing
  • Top Mount Battery
  • 10 Daylight Bright Brightness Settings
  • Parallax Free
  • Unlimited Eye Relief
  • Night-Vision Compatibility
  • Waterproof
  • Shockproof
  • Fogproof
  • Low-Glare Matte Tan Anodized
  • Single-Piece Chassis

Package Contents:

  • Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot
  • Picatinny Mount
  • Custom Tool
  • Most Common Mounting Screw Sets
  • Lens Cloth
  • CR2032 Battery
  • Rubber Cover
  • Glock MOS Plate

Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot Orderable Models

List of Orderable Models

  • Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot, 6 MOA Dot, Tan, 843829145855 , MPN: 843829145855 , UPC: 843829145855 , Code: 99-RD-AAEQD-843829145855
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