Holosun HS510C-FDE 1x 2 MOA Red Dot/65 MOA Circle Open Reflex Sight - Flat Dark Earth

The Holosun HS510C-FDE is an open reflex optical sight purpose-built for rifles and carbines, finished in a durable matte Flat Dark Earth anodized coating. Its Multi-Reticle System combines a precise 2 MOA red dot with a fast-acquisition 65 MOA circle, letting the shooter transition between fine aim and close-quarters targets without changing optics.

At 1x magnification with unlimited eye relief, the HS510C supports both-eyes-open shooting across a wide variety of rifle platforms. The multi-coated lens package sits behind a 0.91" x 1.26" objective window for a clear sight picture, and windage and elevation adjust in .50 MOA clicks for repeatable zeroing.

Power comes from Holosun's Super LED with Solar Failsafe technology, drawing on ambient light while an internal CR2032 battery provides backup power. Shake Awake technology wakes the reticle with motion and returns it to sleep during inactivity, extending battery life up to 50,000 hours on a single cell.

The housing is machined from 6061 aluminum with a protective titanium hood over the emitter, keeping the optic compact at 3.30 inches long and 4.94 ounces. The sight carries an IP67 rating, making it dust-tight and waterproof, and is rated for impact, shock, and weather resistance.

A built-in quick-detach mount sets the optic at a 1.41" absolute co-witness height for AR-pattern flattops, allowing tool-free removal and reinstall while returning to zero. The Flat Dark Earth finish pairs naturally with FDE, desert, and earth-tone rifle builds.