- ‹Home
- ‹
- >
- Vortex Optics
- >
- Vortex Defender-ST Enclosed Solar Micro Red Dot - 3 MOA
Vortex Optics
Vortex Defender-ST Enclosed Solar Micro Red Dot - 3 MOA
Code: DFST-MRD3-E
The Defender-ST enclosed solar micro red dot sight mounts seamlessly on pistols, shotguns, or carbines, delivering reliable zero retention in demanding setups. Its aluminium housing encases the emitter to block rain, dust, and recoil shock, while a 15mm objective lens maintains a clear sight picture. Dual power from a CR1632 battery and integrated solar cell ensures uninterrupted operation, with auto-adjusting brightness that shifts seamlessly from daylight to low-light scenarios. The multi-reticle system offers a 3 MOA dot, 8 MOA circle, or 32 MOA circle-dot, selected via side-mounted controls for rapid target acquisition. At 30g and with a 50,000-hour battery life, it suits extended sessions without added bulk.
Specifications
| Mounting Footprint | DeltaPoint® Pro |
|---|---|
| Dot Size | 3 MOA Dot / 32 MOA Circle |
| Dot Color | Bright Red |
| Battery Type | CR2032 |
| Battery Run Time | 35,000 hrs. without solar / 150,000 hrs. with solar |
| Magnification | 1x |
| Reticle | Multi-Reticle |
| Eye Relief | Unlimited |
| Adjustment Graduation | 1 MOA |
| Travel Per Rotation | 30 MOA |
| Max Elevation Adjustment | 115 MOA |
| Max Windage Adjustment | 145 MOA |
| Parallax Setting | Parallax Free |
| Deck Height | 7.7mm |
| Length | 1.82" |
| Weight | 1.62 oz. |
| Feature Tech | Description |
|---|---|
| Enclosed Aluminum Housing | Durable 7075 aluminium enclosed housing protects against debris and moisture. |
| Multi-Reticle | Quickly adapts to diverse shooting situations. |
| SOLAR with Auto D-TEC Technology | Detects light conditions to automatically draw power from solar or battery as needed. |
| Large Viewing Window | For fast target acquisition and wide field of view. |
| Aspherical Lens | For a distortion-free sight picture and truer colours. |
| Fast-Rackâ„¢ Textured Grip | Aggressive texturing on face of optic for racking slide off any surface. |
| Motion Activation with 10 Minute Auto-Shutoff | Automatically activates with motion while 10 minute auto-shutoff saves battery life. |
| Button Lockout | Prevents accidental brightness adjustment during use or transport. |
| Parallax Free | All red dots and holographic sights will exhibit some small amount of parallax. Matching current industry practice, this small amount would be considered "parallax free" and will make a negligible difference in performance. |
| Unlimited Eye Relief | Non-critical eye relief for rapid target acquisition. |
| Side Load Battery | Easy battery changes without having to rezero your optic. |
| Waterproof | Designed to withstand harsh weather conditions. |
| Fogproof | Designed to withstand a wide range of temperatures. |
| Shockproof | Designed to withstand the highest levels of recoil and impact. |
We will endeavour to despatch your package within 24 hours although at peak times this may take slightly longer. Orders for RIFs may take 48 hours as we test and chronograph each rifle before shipping.
Our couriers only deliver Monday to Friday between the hours of 8am and 6pm (0800 - 1800 hours) except for local and national holidays. We do not directly control the couriers and we cannot obtain a specific delivery time from them. Delivery may be delayed by extreme weather and events and again is out of our control and accept no liability for delays caused by this.
Cost of Delivery
The cost of delivery will be added to your order total. You can select your preferred method of delivery from the options displayed at the checkout. Please select the correct option for your country to ensure that your order is not delayed.
We reserve the right to adjust shipping methods and costs but this is usually done in your favour and you will be informed by email.
Sage Pay’s systems are scanned quarterly by Trustwave which are an independent Qualified Security Assessor (QSA) and an Approved Scanning Vendor (ASV) for the payment card brands.
Sage pay is also audited annually under the Payment Card Industry Data Security Standards (PCI DSS) and is a fully approved Level 1 payment services provider, which is the highest level of compliance. We are also active members of the PCI Security Standards Council (SSC) that defines card industry global regulation.
PayPal
PayPal protects your financial information with industry-leading security and fraud prevention systems. When you use PayPal, your financial information is not shared with the merchant. Once your payment is complete, you will be emailed a receipt for this transaction.





