Hyperdouraku checkes out one of the Open Reflex Sights from Holosun, the HS510C. This is a Multiple Reticle Red Dot Sight that has been designed with a streamlined housing, an open frame for a wide sight picture and minimized obstruction of vision. It has 2 MOA dot 65 MOA Circle and a co-witness sight is also included.

Read the full review here.