Vortex Defender-ST Solar 3 MOA collimator (DFST-MRD3-E)

The Vortex Defender-ST Solar 3 MOA is a closed red-dot sight engineered for extreme durability and dependable performance in harsh environments. Its housing is made from lightweight yet highly durable 7075-T6 aluminum, protecting the optics from impacts, moisture, and dirt. The fully enclosed design keeps the sight operational in rain, mud, or sand—built for users who demand maximum reliability and ruggedness in all conditions.

Key features

• 7075-T6 aluminum housing — full protection against impacts, moisture, and contamination.

• Fully enclosed design — dependable operation in rain, mud, and sand.

• Multi-reticle system — switch between a precise 3 MOA dot and a fast 32 MOA circle.

• Twelve brightness settings — ten daylight modes and two night-vision compatible modes.

• Solar Auto D-TEC — automatic power switching between the solar panel and battery.

• CR2032 battery — up to 150,000 hours of operation with intelligent power management.

• Large aiming window — fast target tracking and a wide field of view.

• Parallax-free optics — rapid target acquisition regardless of eye position.

• FAST-RACK™ texturing — confident slide manipulation and quick reloads.

• Mount compatibility — fits Leupold DeltaPoint Pro (ST) footprint.

• Adapters included — Glock MOS adapter and Picatinny mount for versatile platform fitment.

• Ergonomic design — secure handling even in dynamic situations.

• Waterproof, shockproof, and fog-resistant — ready for any terrain and weather.

Multi-reticle flexibility

Choose a 3 MOA dot for precision or a 32 MOA circle for fast target acquisition. With 12 brightness levels (10 daytime, 2 night-vision compatible), the sight adapts to lighting and tactical conditions, delivering flexibility for sporting, tactical, or defensive use.

Dual power with Solar Auto D-TEC

The Solar Auto D-TEC system senses ambient light and automatically selects the best power source—either the internal CR2032 battery or the integrated solar panel. This yields up to 150,000 hours of reliable operation, so you won’t need to worry about battery status in the field.

Wide field of view for faster first shots

The large sight window provides instant target tracking and excellent situational awareness. In practice, that means faster, more reliable, and more accurate first shots—critical when reaction time determines the advantage.

FAST-RACK™ texturing for tactical handling

Aggressive texturing on the front of the housing enables fast and confident slide manipulation against any surface. You can use holsters, belts, or edges to rack the slide quickly—an important tactical benefit when speed and reliability matter most.

Easy mounting and platform compatibility

Designed for versatility, the Defender-ST Solar fits the Leupold DeltaPoint Pro (ST) footprint and ships with a Glock MOS adapter and Picatinny mount. All required screws and tools are included for quick installation on pistols, rifles, or carbines.

Complete package, ready to use

Each package contains the collimator, CR2032 battery, rubber protective cover, cleaning cloth, spacer plate, mounting tools, and user manual—everything needed to use the optic immediately. Vortex combines durability, smart power management, and practical accessories for confidence in any situation.

Included accessories

Glock MOS adapter, Torx® T-10 wrench, mounting screws, rubber protective cover, multifunction tool, Picatinny rail mount, optics cleaning cloth, battery, manufacturer’s warranty, user manual, and the collimator.

Technical specifications

• Parallax-free: yes

• Dot color: red

• Eye relief: unlimited / no limit

• Magnification: 1×

• Maximum operating time: 150,000 hours

• Number of brightness modes: 12

• Rail mount: 22 mm (Weaver), 22 mm (Picatinny)

• Resistant to: fogging, shocks, moisture, rain

• Reticle types: 3 MOA dot, 32 MOA circle

• FAST-RACK™ texturing: yes

• Solar Auto D-TEC™ system: yes

• Battery: CR2032 (3 V)

• Power source: solar panel, battery

• Reticle changeable: yes

• Motion activation: yes

• Adjustment graduation: 1 MOA

• Automatic shutdown: yes

• Color: black

• Footprint: Leupold DeltaPoint Pro

• Housing material: 7075-T6 aluminum

• Max. elevation adjustment: 115 MOA

• Max. windage adjustment: 145 MOA

• Travel per rotation: 30 MOA

• Total length: 46 mm

• Weight: 46 g

Warranty

Covered by the Vortex Optics VIP Lifetime Warranty.
Supplier symbol: DFST-MRD3-E