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Holosun OPEN REFLEX SIGHT – BLACK 2 MOA GREEN DOT & 65 MOA CIRCLE ALUMINUM/TITANIUM HOOD
Home » Shop » Holosun OPEN REFLEX SIGHT – BLACK 2 MOA GREEN DOT & 65 MOA CIRCLE ALUMINUM/TITANIUM HOOD
Home » Shop » Holosun OPEN REFLEX SIGHT – BLACK 2 MOA GREEN DOT & 65 MOA CIRCLE ALUMINUM/TITANIUM HOOD
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$399.99Original price was: $399.99.$339.99Current price is: $339.99.
Available on backorder
🚚 Not on our shelf today — order now to reserve yours, or call (817) 393-4000 for a current lead time. Free local pickup in Roanoke, TX when it arrives.
The Holosun HE510C GR is an open reflex sight designed for rifles and shotguns, featuring a 2 MOA green dot with a 65 MOA circle reticle. This optic delivers a large viewing window and parallax-free aiming without the tunnel vision of a tube-style red dot. The aluminum and titanium hood protects the glass while keeping weight manageable.
Green dot reticles offer advantages over red in bright daylight and for shooters whose eyes register green wavelengths more sharply. The dual-reticle system lets you switch between the dot alone, the circle alone, or both overlaid depending on your shooting context.
The open reflex design allows both-eyes-open shooting and fast transitions. Because there is no tube to look through, you acquire targets faster and maintain better situational awareness during rapid engagements or moving drills.
Key Facts
Model: Holosun HE510C GR
Reticle: 2 MOA green dot and 65 MOA circle, selectable
Finish: Green
Construction: Aluminum and titanium hood
Why Choose a Green Dot Over Red
Green dots stand out against bright backgrounds where red wavelengths wash out. If you shoot in full sun, snow, or desert environments, green often provides a crisper aiming point. Some shooters also find green easier to focus on quickly, particularly those with red-green color perception differences or astigmatism.
The HE510C GR gives you the same open-window speed as a traditional reflex sight but swaps the red emitter for green. You still get unlimited eye relief, no magnification, and fast both-eyes-open transitions.
2 MOA Dot and 65 MOA Circle Explained
A 2 MOA dot subtends roughly two inches at 100 yards, tight enough for precise shot placement on steel or paper while remaining visible at speed. The 65 MOA circle frames man-size targets inside 25 yards, giving you an instant reference for close-range work without hunting for a tiny dot.
You can run the dot alone for accuracy-focused drills, the circle alone for very close or low-light engagements, or both together for maximum versatility. Most shooters leave both elements on and use the dot for final aiming and the circle for quick gross alignment.
Open Reflex Design and Mounting
Open reflex sights mount to a Picatinny rail and sit above the bore axis, usually at lower-third or absolute co-witness height with your iron sights. The open frame means you see the target and surroundings clearly even when you are not perfectly centered behind the glass, unlike enclosed tube sights that black out when your head position shifts.
If you plan to pair this optic with a magnifier, confirm compatibility with your magnifier mount before ordering. Call 817-393-4000 if you need help matching mounts or checking fit with your rifle setup.
Buying from Western Sport in Roanoke, TX
Western Sport is a licensed FFL/SOT dealer serving North Texas and the DFW area since 2007. Our gunsmith, Lance Rankin, handles installations, transfers, and custom builds on site. Whether you are ordering this optic or need help with other red dot sights, call 817-393-4000 to place an order or ask about fit and compatibility.
Frequently Asked Questions
Q: What is the difference between the HE510C GR and a standard red dot?
A: The HE510C GR uses a green LED emitter instead of red, and it features an open reflex window rather than a closed tube. Green wavelengths are easier to see in bright light for many shooters, and the open frame allows faster target acquisition and better peripheral awareness than tube-style optics.
Q: Can I mount the Holosun HE510C GR on a shotgun?
A: Yes, the HE510C GR mounts to any Picatinny rail and is suitable for rifles and shotguns. The open reflex design works well for fast shotgun transitions, and the 65 MOA circle is especially useful for close-range buckshot or slug work. Confirm that your shotgun has a rail or that you have a compatible rail adapter.
Q: Does the 2 MOA green dot work for precision shooting at 100 yards?
A: A 2 MOA dot is precise enough for most practical rifle work at 100 yards, covering roughly two inches of the target. If you need sub-MOA precision for benchrest or long-range shooting, consider pairing this reflex sight with a magnifier or browsing our rifle scopes instead.
Q: How do I switch between the dot, circle, and combined reticle?
A: Most Holosun open reflex sights use side-mounted buttons to cycle through reticle modes and adjust brightness. Consult the user manual packaged with the optic for the exact button sequence on the HE510C GR, or call 817-393-4000 if you need help before purchasing.
Q: Will this optic co-witness with my AR-15 iron sights?
A: Co-witness height depends on the thickness of the optic’s base and your rifle’s sight height. Many open reflex sights offer lower-third or absolute co-witness when mounted directly to a flattop upper receiver. Call 817-393-4000 to confirm fit with your specific rifle configuration before ordering.
Q: Can I order the Holosun HE510C GR and pick it up at your Roanoke store?
A: Yes, Western Sport is located in Roanoke, TX, and we handle in-store pickup for optics and firearms. Call 817-393-4000 to place your order, confirm timing, and arrange pickup. Our team can also answer questions about mounting, zeroing, and pairing this sight with your rifle.
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