Patent ID: 7032341

Claim:
An adjustable rear firearm sight which comprises: a. a sight body which is mounted on said firearm, said sight body having a center cavity, said center cavity being dimensioned to cooperate with an insert that is internally threaded; b. a screw with an aperture for sighting said firearm, wherein said screw includes a threaded portion which engages said insert, wherein elevation adjustment is achieved by rotating said screw 180 degrees to raise or lower said aperture in equal increments, said screw having a means for providing click stops for each increment of elevation adjustment, said screw comprising a top end, a bottom end and a threaded shank, said screw having a head formed on said top end, said head having a first flat surface, a second flat surface, a first radius, and a second radius, said first flat surface and said second flat surface having scallops forming a sight plane which consists of a flat surface on said top end of said screw that extends from said first radius to said second radius and an aperture notch cut into the center of said sight plane; c. a threaded insert which comprises a cylinder having a threaded inner surface which is dimensioned to receive said threaded shank of said screw and a flange which is dimensioned to interact with a flex plate; said flex late having an opening which fits over said cylinder of said threaded insert and a dovetail shoulder which is dimensioned to be slightly larger than a female dovetail, when said sight, is inserted into a female dovetail of said firearm, said dovetail shoulder presses against the sides of said female dovetail, biasing said sight in said female dovetail and securely attaching said sight to said firearm.