I am color recessive , so it's hard for me to tell finish in a pic if it's the least bit dark . All your rifle should be blued finish , except the reciever and safety which sould be parked . The A4 pic above is a good example of finish . All parts should have a " R " stamp , the rear swivel and both bands being assemblies so only one "R" on each. The triggerguard should be a big bow with a circled "R" on the rear of the mag box and straight lined aft the front screw rim . The buttplate should be fine checkered pattern . Sometimes a couple of parts will have the sub - contractors stamp ( it's "RP" IIRC ) instead of just an "R".
Chris