1. Ro-ràdh
The Vortex Defender-ST Enclosed Solar Micro Red Dot Sight is designed for rapid target acquisition and reliable performance in various conditions. Its fully enclosed design protects the emitter from environmental elements, ensuring durability and consistent operation. This manual provides essential information for the proper setup, operation, and maintenance of your Defender-ST red dot sight.
2. Toradh thallview
2.1 Prìomh fheartan
- Dealbhadh dùinte: Protects the emitter from dust, rain, and impact.
- Lionsa neo-spherical: A 'toirt seachad mòr viewing window for fast target acquisition and a wide field of view.
- Fast-Rack Textured Front: Enhances grip for racking the slide off any surface.
- Multi-Reticle Options: Offers 3 reticle choices (3 MOA dot, 32 MOA circle, and 3 MOA dot with 32 MOA circle).
- Roghainnean soilleireachd: 12 levels, including 10 for daylight and 2 for night-vision compatibility.
- Solar Auto D-TEC Technology: Extends battery life by automatically drawing power from solar or battery sources based on light conditions.
- Gluasad air a ghnìomhachadh: Features a 10-minute auto-shutoff to conserve battery.
- Side-Load Battery: Allows for easy battery replacement without removing the sight.
- Togail seasmhach: Made from 7075 aluminum housing, waterproof, fogproof, and shockproof.
2.2 Co-phàirtean
The Vortex Defender-ST includes the following components:
- Vortex Defender-ST Enclosed Solar Micro Red Dot Sight
- Beinn Picatinny
- Inneal Gnàthaichte
- Còmhdach rubair
- Seataichean Sgriothan-sreap as Cumanta
- Bataraidh CR2032
- Aodach lionsa
- Glock MOS Plate
- Extended Torx T-10 Bit

Figure 1: Labeled components of the Vortex Defender-ST Red Dot Sight.

Figure 2: Contents included in the Vortex Defender-ST packaging.
3. Suidhich
3.1 Stàladh bataraidh
- Locate the battery cap on the right side of the sight.
- Use the provided custom tool or a suitable coin to unscrew the battery cap counter-clockwise.
- Cuir a-steach am bataraidh CR2032 leis an taobh dheimhinneach (+) suas.
- Replace the battery cap and tighten it clockwise until snug. Do not overtighten.
3.2 A’ cur suas an t-seallaidh
The Defender-ST is compatible with a DeltaPoint Pro footprint. Use the appropriate mounting screws and plate for your firearm.
- Ensure your firearm is unloaded and safe.
- Select the correct mounting plate (e.g., Picatinny Mount, Glock MOS Plate) and screw set for your firearm.
- Attach the chosen mounting plate to your firearm according to the firearm manufacturer's instructions.
- Place the Defender-ST sight onto the installed mounting plate.
- Secure the sight to the plate using the appropriate screws from the provided screw sets. Apply thread locker if recommended by your firearm or mount manufacturer. Tighten screws to the recommended torque specifications.
4. Stiùireadh Obrachaidh
4.1 Cumhachd air / dheth
- Gus cumhachd a thoirt air: Press either the '+' or '-' button.
- Gus cumhachd a thoirt dheth: Brùth is cum sìos am putan '-' airson 3 dhiog.
4.2 Atharrachadh soilleireachd
The Defender-ST has 12 brightness settings (10 daylight, 2 night-vision).
- Press the '+' button to increase brightness.
- Press the '-' button to decrease brightness.
4.3 Reticle Selection
The sight offers three reticle options: 3 MOA dot, 32 MOA circle, and 3 MOA dot with 32 MOA circle.
- To cycle through reticle options, press and hold both the '+' and '-' buttons simultaneously for 3 seconds.

Figure 3: Available reticle patterns for the Defender-ST.
4.4 Zeroing (Windage and Elevation)
Adjustments for windage and elevation are located on the side and top of the sight, respectively. Each click typically represents 1 MOA (Minute of Angle).
- Atharrachadh àirde: Use the custom tool or a flathead screwdriver to turn the elevation turret (marked 'U' for Up) on top of the sight. Turning clockwise moves the point of impact down; counter-clockwise moves it up.
- Atharrachadh gaoithe: Use the custom tool or a flathead screwdriver to turn the windage turret (marked 'R' for Right) on the right side of the sight. Turning clockwise moves the point of impact left; counter-clockwise moves it right.

Figure 4: Windage adjustment location on the Defender-ST.
5. Cumail suas
5.1 Glanadh
Keep the lenses clean for optimal performance. Use the provided lens cloth or a soft, lint-free cloth.
- Gently brush away any loose dirt or debris from the lenses.
- Cuir beagan de fhuasgladh glanaidh lionsan air a’ chlò, chan ann gu dìreach air an lionsa.
- Sguab na lionsan ann an gluasad cruinn, a’ tòiseachadh bhon mheadhan agus a’ gluasad a-mach.
- Glan an taigheadas le bog, damp aodach mar a dh’ fheumar.
5.2 Ath-nuadhachadh bataraidh
Refer to section 3.1 for detailed battery installation instructions. Replace the CR2032 battery when the reticle dims or fails to illuminate.
6. A ’dèanamh trioblaid
- Reticle Not Illuminating: Check if the battery is correctly installed and has sufficient charge. Ensure the plastic separator tab has been removed.
- Reticle Appears Distorted/Fuzzy: This can sometimes be due to astigmatism. Try adjusting the brightness settings. If the issue persists, consult an eye care professional.
- Loss of Zero: Ensure all mounting screws are tightened to the manufacturer's recommended torque specifications. Check for any loose components on the firearm or mount.
7. Sònrachaidhean
| Feart | Sònrachadh |
|---|---|
| Ainm Modail | Defender-ST Enclosed Solar Micro Red Dot Sight |
| SKU | DFST-MRD3-E |
| Seòrsa Reticle | Multi-Reticle (3 MOA Dot / 32 MOA Circle) |
| Dath Reticle | Dearg soilleir |
| Roghainnean soilleireachd | 12 (10 Daylight, 2 Night-Vision) |
| Seòrsa bataraidh | CR2032 |
| Faochadh sùla | Gun chrìoch |
| Meudachadh | 1x |
| Fad | 1.8 òirlich |
| Leud | 1.3 òirlich |
| Àirde | 1.2 òirlich |
| Cuideam nì | 1.6 Unns |
| Stuth | 7075 Aluminium |
| Innealan co-fhreagarrach | Firearms with Picatinny Rail (DeltaPoint Pro footprint) |
| Seòrsa stàladh | Picatinny Mount (included) |
8. Barantas & Taic
8.1 VIP Warranty
The Vortex Defender-ST is backed by the Vortex Unlimited, Unconditional, Lifetime, VIP Warranty. This is a fully transferable promise to repair or replace your item if it becomes damaged or defective. This warranty does not cover loss, theft, deliberate damage, or cosmetic damage that does not hinder the product's performance.
For warranty service or support, please visit the official Vortex Optics weblàrach-lìn no cuir fios chun t-seirbheis teachdaiche aca gu dìreach.
Airson tuilleadh fiosrachaidh, tadhail air: Vortex Optics Official Weblàrach