Chuck in Denver - Thanks for clarifying about National Ord. and Santa Fe Arms being the names found on the 'sketchy' privately made cast 1903A3 receivers & parts guns.
(Federal Ordnance appears to have been involved with importing parts, and cast M1 carbine and M14receivers. Apparently, they were physically next-door and eventually had some connection with National Ord.)
Best wishes and prayers for you and the health of your Girlfriend.