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Q&A for Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot — 28 Questions & 10 Answers

Name Vortex Optics OPMOD Defender-ST 1x Reflex Micro Red Dot (4.9)
$449.99 $217.34 Save 52%
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Q
Trevor Golter, member, from NE, United States, asked on March 04, 2025

Do you have to remove to replace the battery?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on March 25, 2025

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.

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Q
Trevor Golter, member, from NE, United States, asked on March 04, 2025

Is it a RMSc footprint?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on March 25, 2025

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

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Q
Jay, member, from NV, United States, asked on September 02, 2025

can you direct mount this to a Sig M17?

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A
Answered by Ethan, Gear Expert, from IL, United States, on September 03, 2025

Yes, the Vortex Optics OPMOD Defender-ST will mount directly to the optic ready slide of your P320 M17.

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Q
ric, member, from IN, United States, asked on April 29, 2025

Will this fit a FN 510 mrd

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on May 19, 2025

Yes, to mount this optic to your 510 MRD, you will need to use the #1 MRD plate (Deltapoint Pro), paired with the #505 MRD insert. If you do not have the adapter plates required, they can be purchased from FN directly.

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Q
ric, member, from IN, United States, asked on April 28, 2025

Will this go on a Sig Sauer P320 M18 9mm

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on May 19, 2025

Yes, the Vortex Optics OPMOD Defender-ST will mount directly to the optic ready slide of the P320 M18.

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Q
Dre, member, from GA, United States, asked on March 31, 2025

Can I use this red dot as a off set to my Vortex Opmod SFP?

A
Answered by jerryb, member, from MI, United States, on April 05, 2025

It comes with a low profile 1913 mount, so yes, if you have a 45 degree offset 1913 or Delta Point Pro mount. It would be a great companion to an LVPO.

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Q
roy, member, from FL, United States, asked on November 29, 2025

What's OPMOD ?

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Q
Nick, member, from OH, United States, asked on November 28, 2025

Is this mostly plastic?

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Q
Dalton Garrett, member, from AK, United States, asked on November 23, 2025

does it fit p375x? Factory slide.

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Q
paulie, member, from FL, United States, asked on November 08, 2025

Will this fit Glock 43x

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