Manufacturers Ruger Black Powder Revolvers Old Army Rear Sight Assembly, Complete, Blued, New Factory Original (w/ Bump & Cross Pin)
Rear Sight Assembly, Complete, Blued, New Factory Original (w/ Bump & Cross Pin)

This part is found in the following schematics

Rear Sight Assembly, Complete, Blued, New Factory Original (w/ Bump & Cross Pin)

This part is found in the following schematics