HOLOSUN RED DOT SIGHT - The HS510C sight is a versatile open reflex optic designed for long gun applications; It is at home on carbines, PCCs, and shotguns due to its durable design; This gun ...

Reflex sights also come in two varieties ... there is a notch in the rear of the sight body for co-witnessing with open sights. The sight is not submersible but does have an IPX4 rating ...