Charles, yes Sir it does. (This model does require drilling & tapping since not done by the factory).

Charles - it's definitely a job for a professional gunsmith or machinist as it would require specialized tools/machinery to do it correctly. Just be prepared to pay some good money for it.

Its a job for a gunsmith

According to the schematics, you'll have to either do the drilling yourself or bring it to a smith for the Marbles sight. Good luck. taylorsfirearms.com/uberti-1873-rifle-parts.html