This factory manufactured receiver peep sight mounting screw (also known as the gib lock screw is for the earlier Ruger model 44 RS semi-auto carbine which has the dovetailed notch on the left side of the receiver for the factory installed peep sight and is in very good condition with light slot wear. (file photo)
Note: Ruger model 44 RS semi-auto carbines with the following serial numbers have been observed with this part: 97061
