Well I know when my friend got the rifle there was no rear sight base collar on the barrel also no front sight. I know there was a front sight installed at one time because you could see the marks on the barrel left by the front sight band. The 1903 receiver had already been drilled and tapped for a one piece scope base and was wearing a sporter stock.

I only assumed the barrel might be an 03 because why would someone put an 03A3 barrel on a 1903 receiver, but then again they might have already planned for the scope and just didn't care.