From what you've said about your rifle in your previous post,I would guess it to be an arsenal rebuilt rifle.
If you get Scott Duff's book about WWII Garands or Bruce Canfield's Garand book you can get a real idea of the time period of the parts used,from the drawing numbers stamped on them.
For example,I have a Garand with a 1944 Winchester receiver,rebarreled with a 1948 S.A. barrel,it had a post war trigger group on it and an International Harvester stock.
The oprod was a S.A. around '42 I think and the remainder were mixed WWII parts.
These guns are very different than the 1911's where we look for all originality.Most Garands are mixed from several different rebuilds,but that's a collectable in it's own right,because the history of the gun shows in the way the government made it ready to put in some GI's hands for the next conflict.
A true original Garand is a rare bird.Because of people restoring a Garand to be "correct" it's hard for a novice like me to even think about looking for an original.
OK, here's mine. I got it from the CMP in January and refinished and restocked it. The original stock looked like Uncle Jed's whittlin' stick. The front sight looked like it was used to build a house with using it as the hammer.