Holosun Open Reflex 2MOA Dot or 2MOA Dot with 65MOA Circle Solar with Internal Battery

Product Description

The Holosun HS510C is an open reflex sight with selectable 2MOA dot or 2MOA dot with 65MOA circle reticle, solar power with internal battery backup, and unlimited eye relief. This reflex sight is built for carbines, shotguns, and rifles where speed and both-eyes-open shooting matter.

The open design eliminates the enclosed tube found on traditional red dots. You get a wider field of view and faster target transitions. The dual-reticle system lets you switch between a precise 2MOA dot for accuracy or add the 65MOA circle for close-range speed and peripheral reference.

Solar failsafe technology powers the optic in bright conditions and automatically switches to internal battery when light fades. The system ensures the reticle stays live across changing environments without manual intervention.

Key Facts

• Model: HS510C
• Reticle Options: 2MOA dot or 2MOA dot with 65MOA circle, user-selectable
• Power System: Solar with internal battery backup
• Sight Type: Open reflex design

How the Reticle Options Work

The HS510C offers three reticle modes you can toggle through on the fly. Use the 2MOA dot alone for precise shot placement at distance. Switch to the 65MOA circle alone for fast acquisition on close targets where the outer ring guides your eye to center. Or combine both for a versatile setup where the dot provides precision inside the circle’s speed ring.

The 2MOA dot is fine enough for headshots and small vitals past 100 yards while remaining visible in daylight. The 65MOA circle appears large in the window but does not obstruct your view thanks to the open reflex design—your peripheral vision extends well beyond the frame.

Open Reflex vs. Enclosed Red Dot Sights

Traditional enclosed red dots use a tube that houses the emitter and lens. The Holosun HS510C uses an open frame where only the glass sits in front of you. The difference is immediate when you mount the gun: no tunnel vision, no shadow around the edges, and faster transitions when engaging multiple targets.

Open reflex sights excel in three-gun competition and home defense where situational awareness matters as much as the shot itself. The trade-off is exposure—the glass and emitter are less protected than a fully enclosed tube, though the housing still guards against direct impact. Many shooters pair this style of sight with other red dot configurations depending on the gun’s role.

Solar Power and Battery Backup

The solar panel on top of the unit powers the reticle when ambient light is sufficient. In full sun, the optic runs indefinitely without touching the internal battery. As conditions darken—moving indoors, dusk, overcast—the internal battery takes over automatically. You do not toggle between modes; the sight handles the transition.

This dual-power setup extends battery life significantly compared to battery-only red dots. The internal battery acts as insurance rather than the primary source, so replacement intervals stretch longer between range sessions.

Buying from Western Sport in Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving the North Texas and DFW area since 2007. We handle transfers, special orders, and provide gunsmithing services on site. Call 817-393-4000 to confirm current details or place an order for the HS510C.

Frequently Asked Questions

Q: What is the difference between the 2MOA dot and the 65MOA circle on the HS510C?

A: The 2MOA dot is a small aiming point for precise shooting, while the 65MOA circle is a large outer ring that speeds up target acquisition at close range. You can use either reticle alone or display both at the same time, depending on what the shot requires.

Q: Will the HS510C co-witness with iron sights?

A: Co-witness height depends on the mount you use with the HS510C, not the optic itself. Call 817-393-4000 to confirm which mount height will align with your specific iron sight setup.

Q: How does the solar power work on the Holosun HS510C?

A: A solar panel on top of the sight powers the reticle in sufficient light, and an internal battery automatically takes over when conditions darken. The system switches between power sources without any input from the shooter, extending overall battery life.

Q: What is an open reflex sight and why choose it over a tube red dot?

A: An open reflex sight frames the glass without enclosing it in a tube, giving you a wider field of view and eliminating tunnel vision. It is faster for close-range work and situational awareness, though the emitter is more exposed than in a fully enclosed optic.

Q: Can I mount the HS510C on a shotgun or rifle?

A: Yes, the HS510C mounts to any platform with the appropriate base or rail system. The open reflex design and unlimited eye relief make it suitable for carbines, shotguns, and rifles where rapid target transitions are important.

Q: How do I buy the HS510C from Western Sport?

A: Western Sport is located in Roanoke, Texas, and serves as a licensed FFL dealer for North Texas and the DFW area. You can call 817-393-4000 to place an order, ask questions, or arrange a transfer if you are purchasing from another source.