Ridalpho - Check the "sticky" at the top of the '03 forum page in regards to "original configuration". It displays factory finishes. Blued vs. parked, etc.
Likely the original barrel. I think the original stock should have pins vs. bolts. Do you see any encircled "P"'s under the wrist?
The mix of parts and color of the park on some of them is common with rifles that have been through an arsenal rebuild.
Mike