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Questions & Answers
Will this fit onto my Glock 19x mos? Expert Answer

The Vortex Defender-ST is compatible with your Glock 19X MOS. It will include an MOS adapter plate, and hardware, which will allow you to install it to your optic ready slide.

by Ethan, Gear Expert, October 3, 2025
Will if mount on a Glock 43x mos Expert Answer

No, the Glock 43X is designed to accept optics that utilize the smaller RMSc footprint. The correct model would be the CCW version, which can be found linked below:
https://www.opticsplanet.com/vortex-defender-ccw-1x-reflex-micro-green-dot-sight.html

by Ethan, Gear Expert, October 1, 2025
Customer Reviews
Helpful Positive Review
Perfect for my Mini Thirty by PH, Verified Owner, September 23, 2025
This completes my Mini Thirty (with Ultimak rail) perfectly. Easy set up, low profile, excellent sight picture, about a pound less weight than the Burris scout scope or Holosun Red Dot I used before.
1/1 found this helpful
Helpful Positive Review
Awesome green dot by Daniel P, Verified Owner, November 22, 2025
This is my first green dot. A lot better than my other red dots. Window size is perfect, super easy assembly. I recommend.
1/1 found this helpful
Helpful Positive Review
Great optics by Mike, Verified Owner, November 30, 2025
Great optics, will be buying again.. kept 0 at the range.
1/1 found this helpful
Helpful Positive Review
heavy duty by C.T., Verified Owner, August 12, 2025
Overall nice optic, but I ordered by mistake. I needed an RMR footprint. This is Delta point pro footprint But will certainly revisit this product in the near future
2/2 found this helpful
Most Recent Reviews
Another Vortex win by Brad Brown, Verified Owner, October 3, 2025
Great product and unmatched warranty. I only wish it had auto adjust on the brightness
0/1 found this helpful
Most Recent Reviews
Improvement over Venom & Viper by Bushdog, Verified Owner, January 10, 2026
This is my 3rd Vortex micro Dot sight and the best one so far. It was easy to sight-in and I liked the improved click adjustment. Also love the shake-awake activation option. The Venom I bought a Month earlier appears to be defective and wont adjust....
Read More...
0/1 found this helpful
Read All 16 Reviews
Color:
Black
Reticle:
3 MOA
Illumination Color:
Green
Condition:
New
Red Dot Sights-Footprint:
Deltapoint Pro

Code: VX-RD-RYFFG-DFST-MGD3

MPN: DFST-MGD3

UPC: 843829145800

List: $449.99Save 45%
$249.49

Product Info for Vortex Defender-ST 1x23mm Reflex Micro Green Dot Sight

The Do-It-All Micro Red Dot. Handguns. Shotguns. Offset on a carbine. Whether running drills at the range or holding the line during rigorous duty use, the Defender-ST is ready when and wherever you are. Rugged and reliable? Its a given. Large sight window? Absolutely. Motion-activation and a dot with adjustable brightness deliver superior target acquisition, adaptability in all lighting conditions, and faster follow-up shots. Experience what shooters mean when they discuss the ideal, all-round red dot. With the Defender-ST, you're not just range-ready, but armored for the toughness and adaptability your world demands.image

Specifications for Vortex Defender-ST 1x23mm Reflex Micro Green Dot Sight:

Manufacturer: Vortex
Color: Black
Magnification: 1 x
Objective Lens Diameter: 23 mm
Reticle: 3 MOA
Illumination Color: Green
Eye Relief: Unlimited
Adjustment Click Value: 1 MOA
Battery Type: Lithium Metal, CR2032
Weight: 1.48 oz
Condition: New
Red Dot Sights-Footprint: Deltapoint Pro

Features of Vortex Defender-ST 1x Reflex Micro Green Dot Sight

  • Bright Green Dot
  • Large Viewing Window
  • ShockShield Polymer Insert
  • Fast-Rack Texturing
  • Motion Activation With 10 minute Auto-Shutoff
  • Button Lockout
  • Top Mount Battery
  • 10 Daylight Bright Brightness Settings
  • Night-Vision Compatibility
  • Parallax Free
  • Unlimited Eye Relief
  • Low-Glare Matte Black Anodized
  • Single-Piece Chassis
  • Waterproof
  • Fogproof
  • Shockproof

Package Contents:

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

Vortex Defender-ST 1x23mm Reflex Micro Green Dot Sight Orderable Models

List of Orderable Models

  • Vortex Defender-ST 1x 23mm Reflex Micro Green Dot Sight, 3 MOA, Black, DFST-MGD3 , MPN: DFST-MGD3 , UPC: 843829145800 , Code: VX-RD-RYFFG-DFST-MGD3

Vortex Defender-ST 1x23mm Reflex Micro Green Dot Sight Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Vortex Defender-ST 1x 23mm Reflex Micro Green Dot Sight, 3 MOA, Black, DFST-MGD3 , MPN: DFST-MGD3-DEMO , Code: VX-RD-RYFFG-DFST-MGD3-DEMO-OB-A
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