Holosun Technologies HS510C, Reflex Sight, Multiple Reticle, 65 MOA Circle, 2 MOA Red Dot, Aluminum Housing, Matte Finish, Flat Dark Earth, Solar with Internal Battery HS510C-FDE The HE510C-GR Elite is Holosun's flagship Open Reflex optic. The HE510C-GR Elite has an open frame for a wide sight picture. The HS510C Elite is powered by their new, Advanced Super Solar Technology as well as, a CR2032 battery. Utilizing their multi-reticle system (MRS) this unit features three reticle choices. The HE510C-GR can be switched between a 65 MOA circle with 2 MOA dot, a 2 MOA dot only, or a 65 MOA ring only, all at the push of a button. This optic is protected by a titanium-alloyed hood.