Been rebuilt before or after Korea. Trigger housing and slide are Inland.
Rock-Ola barrel should be original to the receiver. It may should have a date two inches below the front sight.
Bolt is Winchester refinished
Rear sight, late war or replacement. With your early number. it would be a replacement. It would have had a flip rear sight.
It would have had a narrow type 1 band not the replacement type 3 band.
Stock is a replacement.
Hammer is a replacement. Quality parts would have a Q in the code letters for the most part.