Holosun HE510C-GR FDE Green Dot Reflex Sight, MRS

The Holosun HE510C-GR FDE Green Dot Reflex Sight is a non-magnified, open-reflex optic built for carbines, PCCs, and shotguns, featuring Holosun’s Multi-Reticle System (MRS) for fast, adaptable target acquisition. It projects a crisp 2 MOA green center dot with selectable reticle configurations, making it well suited for duty, patrol, defensive, and range applications on long-gun platforms.

Manufactured by Holosun, the HE510C-GR FDE combines a rugged aluminum body with a titanium protective hood and a Flat Dark Earth finish. The open-reflex design provides an unlimited eye relief, parallax-free sight picture that remains forgiving in dynamic shooting positions, while dual power sources support extended, dependable operation.

At the heart of the HE510C-GR FDE is Holosun’s Multi-Reticle System (MRS), allowing the shooter to toggle between a 2 MOA center dot for precise aiming or a combined dot-and-circle reticle for rapid visual indexing at close range. A green Super LED enhances visibility across lighting conditions. Power is supplied by an internal CR2032 battery with Solar Failsafe, and Shake Awake technology conserves battery life by activating the reticle on movement.

Key Features

• Multi-Reticle System (MRS): selectable 2 MOA dot or dot-and-circle reticle

• 2 MOA green center dot for precise point of aim

• Solar Failsafe + CR2032 battery for redundant power sources

• Shake Awake technology to extend battery life

• Quick-detach Picatinny mount with absolute co-witness height

• Aluminum housing with titanium hood for increased shock resistance

• Parallax-free optic with unlimited eye relief

• Up to 50,000 hours of reported LED battery life at specified settings

Specifications & Construction

• Magnification: 1x

• Materials: Aluminum body with titanium protective hood

• Finish: Flat Dark Earth (matte)

• Dimensions (listed): Approx. 3.25 x 3.65 x 4.80 inches

• Overall Length: Approx. 3.3 inches

• Objective Window: Approx. 0.91″ x 1.26″

• Weight: Approx. 8.3 oz

• Adjustment Increment: 0.50 MOA windage and elevation

• Optics: Multi-coated lenses

• Power: Internal CR2032 battery with solar backup

Compatibility & Intended Use

The HE510C-GR FDE mounts to standard Picatinny (1913) rails via its integrated QD mount. Typical use includes AR-pattern rifles, patrol carbines, PCCs, and shotguns where a primary, non-magnified optic with MRS capability is preferred. It supports absolute co-witness with compatible iron sights and excels in duty, defensive, home defense, and range configurations requiring a fast, unobstructed sight picture.