This is the Holoson HS510C MRS 2 MOA red dot with 65 MOA circle open reflex sight.

The HE510C is a versatile open-reflex optic designed for long gun applications. At home, the HE510C optic can be used on carbines, PCCs, and shotguns due its durable design. It features an aluminum housing with a titanium hood for added shock resilience, while also including a QD absolute co-witness mount (1.41” dot height).

HE510C is packed with Holosun innovations:

• Solar Failsafe
• Shake Awake
• MRS (Multi-Reticle System)
• Red Super LED with up to 50k hour battery life
• 10 daylight and 2 night vision compatible intensity settings

Comes with the following:

• Absolute Cowitness QD Mount
• T10 L Key
• User Manual
• CR2032 Battery
• Lens Cloth