Rock Island 1903, possible NM rifle?

[Promo]

Were the post WWI NM rifles which were fitted with barrels made using leftover AV steel blanks then also marked AV on the barrels, or with whoever used the steel blanks (SA)?

Edit: might be for not being native US, but how exactly can I imagine a "steel blank" for a 1903 barrel to be like? Already rifled, already chambered, already milled down to correct outline shape, already threaded, already marked in any way? And would this be different for the AV and the RIA blanks?