The books say they can have a bright polished bolt, but I don't think there is any chance this is correct on an original as produced rifle. In July 1942 the Marines took inventory of all their NM rifles they planned on using for the Sniper program. They had a 1047 of them, and they notate that the bolts of those rifles are bright polished. So they were ordered to take All of the polished bolts and put them thru a bluing process and put them into storage marked Sniper equipment.
Six months later the order is given to start mounting scopes. So those bolts were blued long before the first scope was ever mounted. Not only should every Marine Unertl Sniper have a blued bolt, but all the Marine NM rifles at that time should have had a blued bolt. Even the ones not converted to a sniper rifle.
The finish on the mounts on the scope are correct. They are anodized. Over time the Anodizing will start to turn colors. Originally they were black, but that is normal for these scopes.