Models Handgun Rear Sight (Reverse, Low Mount, Novak Dovetail) 16 427 1 Ruger Blackhawk No. 5 Frontstrap 23 452 1 Ruger Blackhawk No. 5 Backstrap 12 289 0 Ruger Blackhawk standard length ejector rod housing 10 231 0 Ruger Blackhawk Bisley Grip Frame 26 599 2 Ruger New Model Blackhawk cylinder 44 special 20 448 0