IMHO - The barrel muzzle 'crown' is neatly done, but, not Springfield Armory work.

The front-sight base is a Krag base that has been 're-shaped' and apparently fitted and soldered on a new 'flat' or dovetail, filed or machined into a likely cut-down rifle barrel. (Once again, not SA work)

BTW - Your stock and hand-guard are worth more than you paid for the entire 'replica' carbine.