This Ruger manufactured adjustable rear sight assembly is for the target model Mark II semi-auto pistol with a 5 1/2", 6 7/8" or 10 1/2" long barrel and is in very good condition with light wear. (file photo)
Note: Ruger Mark II semi-auto pistols with the following serial numbers have been observed with this part:
19-92632
217-47229
221-10996
