Help with new carbine Parts identification, plea

I recently picked up a new carbine, it is a late war inland barrel date, 11-44. Overall, the carbine is very nice the muzzle wear is at a 1.5, but some of the parts I know are incorrect. The receiver is a type two national Post meter marked N16 on the left side,hammer I believe as a type three Rockola it has a B/R in a circle, hand guard I believe is type one but is unmarked and it’s a two rivet, bolt is flat type two with a W stamp for Winchester, rear sight is an H inside of the shield type two? Sear type one quality hardware/IBM with initials BOB on the side. Trigger is type two with initials TB stamped in it for IBM? The stock is a high Wood very nice very clean. There is a P inside a square on the bottom of the pistol grip, It is unmarked, but appears there may be a faint C in the sling Well, possibly RMC/Rockola? I know the stock is not correct for a late war issue , Just curious about them being unmarked? Any insights on this would be greatly appreciated and thank you in advance!

so who used unmarked high wood stocks and unmarked 2rivet hand guards?