Description
This professional-grade combo pairs Holosun’s green multi-reticle reflex sight with a flip-to-side 3X magnifier, enabling rapid transitions from close-quarters speed to mid-range precision on a single platform.
Whether you’re running drills at close range or engaging targets out to 300 yards, switching between unmagnified and magnified views shouldn’t require removing optics or losing zero. The HE510C-GR & HM3X Combo delivers instant adaptability through its flip-to-side magnifier design, letting you transition from rapid target acquisition to precise shot placement in under a second. The green reticle technology offers enhanced visibility in varied lighting conditions, while the multi-reticle system adapts to your specific shooting scenario—from the expansive 65 MOA circle for fast acquisition to the precise 2 MOA dot for accuracy.
Key Features
- Multi-Reticle System: Three reticle options (2 MOA dot, 65 MOA circle, or combined circle-dot) switchable at the push of a button without re-zeroing
- Dual Power Source: Solar Failsafe technology combined with CR2032 battery provides up to 50,000 hours of operation on dot-only mode at setting 6
- Ambidextrous Magnifier Mount: Quick-detach flip-to-side design configurable for left or right-handed operation with included height spacer for absolute or lower 1/3 co-witness
- Military-Grade Construction: 6061-T6 aluminum housing with Grade 5 titanium protective hood on the optic; durable aluminum magnifier body rated IP67 water-resistant
Important Compatibility Notes
- The HM3X magnifier is designed to pair with red dot sights and works with various manufacturers’ optics, not just Holosun models
- Both components include standard Picatinny/Weaver rail mounts
- The set includes spacers for both the HE510C-GR optic and the HM3X magnifier, allowing proper height matching and the option for a lower 1/3 co-witness setup.
- The combo includes one spacer with the HM3X for height matching between optic and magnifier
Why We Carry It
The HE510C-GR earned recognition as part of Holosun’s Elite series, featuring their limited lifetime warranty on the housing and optical system. Professional shooters and competitive PCC athletes gravitate toward this combo because it addresses a fundamental challenge: maintaining both speed and precision without switching complete optic systems. The open reflex design provides an expansive field of view that helps prevent tunnel vision during dynamic shooting, while the 3X magnification extends effective range for target identification and precise shot placement. User feedback consistently highlights the clarity of the green reticle against varied backgrounds and the solid lockup of the flip-to-side mount that maintains zero through repeated deployments.
How does the green reticle compare to traditional red dot sights?
Green light wavelength (540nm) falls closer to the peak sensitivity range of human vision, which some shooters find easier to acquire quickly, particularly in urban or drab environments. The choice between red and green remains largely personal preference, though individuals with certain types of astigmatism sometimes report clearer green dots. Holosun offers the HS510C in red if you prefer that color, with identical features and performance.
Does the magnifier affect my zero or require separate zeroing?
The magnifier simply enlarges your existing sight picture without changing your point of impact, so it does not affect your red dot’s zero. However, the HM3X includes windage and elevation adjustments that allow you to fine-tune alignment if the magnified image doesn’t perfectly center on your dot. Most users report minimal or no adjustment needed when properly mounted.
What’s the actual eye relief, and will it work with my shooting position?
The HM3X provides 2.75 inches of eye relief. This measurement works well for most AR-15 style rifles with standard stock positions. Some users report the eyebox (the three-dimensional space where you can see the full sight picture) requires more precise head positioning compared to premium magnifiers, particularly when shooting from unconventional positions. The adjustable diopter helps dial in focus for your vision.
Care Instructions
The HE510C-GR requires minimal maintenance due to its sealed design and solar backup power. The Shake Awake feature automatically powers down the optic after five minutes of inactivity and instantly reactivates upon movement, dramatically extending battery life beyond the rated 50,000 hours in real-world use. Periodically wipe the lenses with a microfiber cloth to remove debris, and check that mounting screws remain properly torqued. The battery compartment features a side-access tray design, allowing battery changes without removing the optic from your firearm. The magnifier’s flip mechanism includes an adjustable tension screw—tighten if the magnifier flips too easily or loosens if it’s too stiff.
Spec Sheet
HE510C-GR Specifications:
- Reticle: Green 2 MOA Dot & 65 MOA Circle (Multi-Reticle System)
- Light Wavelength: 540nm
- Window Size: 0.91″ x 1.26″
- Dimensions: 3.3″ x 1.68″ x 1.78″
- Weight: 4.94 oz
- Housing Material: 6061-T6 Aluminum with Grade 5 Titanium Hood
- Surface Finish: MAO (Micro Arc Oxidation)
- Adjustment per Click: 0.5 MOA
- Windage & Elevation Travel Range: ±50 MOA
- Power Source: CR2032 Battery with Solar Failsafe
- Battery Life: Up to 50,000 Hours (Setting 6, dot only); 20,000 Hours (circle and dot)
- Brightness Settings: 12 Total (10 Daylight & 2 NV Compatible)
- Mount Height: 1.41″ (Absolute Co-Witness)
- Working Temperature: -30°C to 60°C (-22°F to 140°F)
- Waterproof Rating: IP67
- Vibration Resistance: 1000G
- Parallax: Free with Unlimited Eye Relief
- Warranty: Limited Lifetime (Housing & Optics); 10-Year (Illumination System)
HM3X Specifications:
- Magnification: 3X
- Eye Relief: 70mm (2.75″)
- Exit Pupil: 7.6mm
- Field of View: 7 Degrees
- Transmittance: 75%
- Dimensions: 3.9″ x 1.7″ x 2.5″
- Weight: 9.8 oz
- Housing Material: Durable Aluminum
- Surface Finish: MAO (Micro Arc Oxidation)
- Mount Type: Quick Detach, Ambidextrous Flip-to-Side (Picatinny)
- Included Accessories: Height Spacer, Adjustment Tool
- Working Temperature: -21°C to 60°C (-6°F to 140°F)
- Waterproof Rating: IP67
- Vibration Resistance: 1000G
- Diopter: Adjustable
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