Hey there KING
To begin with, you have a really fine Revolver. Nothing to be concern'd with at all.
The Hammer and Firing Pin as shown are Italian Parts as is the Ejector Rod Housing. No reason not to believe it is built from Italian Parts. USFA took Italian parts in the white and turn'd 'em into really FINE guns. Folks also forget, when USFA began to make their won parts, they copied the previous Italian parts so an ALL US parts gun has exactly the same overall dimensions as the prior guns.
Oft, Collectors get all Wudge wudgy over the difference between Italian parts USFA and US parts USFA. In the bigger picture, the only people who care where the parts came from are Collectors who don't even shoot their toys. Log view, matters not if an Italian parts gun or US parts, as their all the exact same dimensions and doesn't have anything to do with how well the guns shoot.
Yours does have a little too much steel inna barrel though. Near three inches too much. That can be fix'd though