Ira Mark Kay, Clifford E McLain: Wide field of view reflex gunsight. Shlesinger Arkwright & Garvey, September 29, 1998: US05813159 (24 worldwide citation)

A gunsight comprises a unitary frame (2) for securing to a gun. The frame (2) has a ring (20) with a lens (22) at its front end. A light source (36) is secured to the frame rear end to project a light spot onto the lens (22). The lens (22) and the light source (36) may be independently adjustable in ...