A gun sight assembly including a body to be held against a surface of a gun, a sight carried by the body, an anchoring part received within a dovetail groove in the gun, and a threaded fastener extending through an opening in the body and threadedly connected to the anchoring part and operable to pull...http://www.google.ca/patents/US5467552?utm_source=gb-gplus-sharePatent US5467552 - Gun sight mounting structure
