Holosun HS510C Open Reflex Red Dot Sight (2 MOA Dot / 65 MOA Circle)
The Holosun HS510C is a 1x open reflex sight with a wide window and a selectable Multi-Reticle System, letting you run a 2 MOA dot, a 65 MOA circle, or the circle-dot combination.
It features Solar Failsafe and Shake Awake, a side-mounted CR2032 battery tray, and an integrated QD co-witness Picatinny mount.