Sasquash said:
About parts, I ordered a mainspring for the Chiappa Enfield 1853 and fits perfectly. I suspect that other parts from Chiappa or Pedersoli will work just fine.
Euroarms Enfield Rifle Muskets and those Navy Arms Enfield copies made by Euroarms, were manufactured by Armi San Paolo. The only difference between Navy Arms Enfields and Euroarms Enfields were that Val Forgett, Jr. had them stamp a Crown and "VF" (for Val Forgett) on the Navy Arms lock plates. Otherwise, all parts totally interchange.
Armi Sport was the Italian Arms manufacturer that made the Enfield Rifle muskets originally sold through Taylors & Company and are often known as Chiappa made guns. Though the Armi Sport mainspring and possibly sear spring may fit the Armi San Paolo/Euroarms/Navy Arms Enfields, the rest of the lock parts won't fit with the possible exception of the stirrup. (I'm not sure about the stirrup as I never tried interchanging that part.) I would have to pull out the parts, but I don't think the lock screws will interchange, either.
My first WBTS gun was a real British made Parker Hale P 1858 "Rifle" that I used to reenact as a Confederate States Marine and shot it with live rounds every now and then. I handled and worked on a LOT of Navy Arms/Euroarms P 1858 "Rifles" and never noticed any real difference in weight between them and the real Parker Hale P 1858. (BTW, A "Rifle Musket" was the original and common nomenclature for a full length "3 Band" percussion Musket as in the P1853 Repro's and M 1855/1861 Springfields with three Bands. A "Rifle" was the nomenclature for the 2 Band P 1858 and 2 Band M 1855/1861 Springfields. Shorter percussion military arms for both Enfield and Springfield guns firing the Musket Cartridge were known as either Carbines or Musketoons.)
Also, parts for the real British Parker Hale Rifle Muskets will totally interchange with original "Interchangeable Parts" Enfields - but they won't interchange with either the Navy Arms/Euroarms/Armi San Paolo Enfields and they also won't interchange with the Armi Sport/Chiappa Enfields.
Though the Navy Arms/Euroarms/Armi San Paolo Enfields are not as high quality as the real British Made Parker Hale guns, they are very serviceable guns.
Gus