Ruger 22/45 MK III, .22 long rifle cal. auto pistol.  Serial #271-75859.  Excellent condition.  4 3/8" heavy flatside barrel has an excellent bore, fixed sights.  99% blue finish on the barrel and receiver.  Factory drilled and tapped for a mount.  Excellent black polymer frame with Ruger marked black checkered grips.  Comes with one excellent factory magazine.  Includes keys, paperwork and maker's gray hard case with correct label.  Looks near new.