The Holosun HS510C open reflex sight with a 2 MOA red dot and 65 MOA circle in Flat Dark Earth is a versatile optic for long-gun applications, at home on carbines, PCCs, and shotguns thanks to its durable design. Holosun builds the HS510C-FDE with an aluminum housing and titanium hood for added shock resilience, and a QD absolute co-witness mount sets dot height at 1.41 inches with a lower 1/3 co-witness spacer available separately to increase height to 1.63 inches. The sight packs Solar Failsafe, Shake Awake, Multi-Reticle System selection, and a Red Super LED rated for up to 50,000 hours with 10 daylight and 2 night-vision-compatible intensity settings. Among Flat Dark Earth red dot sights, this configuration favors coordinated desert-finish builds.

Key Specifications

• The reticle combines a 2 MOA red dot with a 65 MOA circle, selectable as a Multi-Reticle System.
• The housing pairs aluminum construction with a titanium hood for added shock resilience.
• The finish is Flat Dark Earth, suiting desert-coordinated builds.
• The mount is a QD absolute co-witness design, setting dot height at 1.41 inches.
• A lower 1/3 co-witness spacer is available separately, increasing dot height to 1.63 inches.
• The LED offers 10 daylight and 2 night-vision-compatible intensity settings, rated up to 50,000 hours.

Frequently Asked Questions

Why choose FDE over black for this sight? It matches Flat Dark Earth-coated rifles and desert-terrain builds for a coordinated finish.

Can I adjust the co-witness height? Yes, a lower 1/3 co-witness spacer is available separately to increase dot height from 1.41 to 1.63 inches.

Buy the Holosun HS510C, FDE, Red/65 MOA

A desert-coordinated build gets the same shock-resilient HS510C platform here in Flat Dark Earth. Order it from our Lubbock, Texas gun shop and it ships fast.