The best way to get what you want is to drive to the CMP and pick out what you want.
I just did that, drove 700 miles to Camp Perry North and picked up a HRA Service Grade.
(Shooting Small bore prone at the National Matches was just an excuse to buy rifles!
)
Unless the rifle is correct grade, you will get something that has mixed parts. My rifle has a SA WWII operating rod, SA late production bolt, trigger group and stock. I suspect the HRA parts were switched out on the bench with a beat up but correct SA to keep the rifle from going out with all HRA parts.
If you want to have an all correct service grade rifle for $595, go to the CMP with a couple of buds. Buy rifles and swap out parts in the parking lot.
Stocks are getting rare at the CMP. The Greeks evidentally busted and broke a lot of stocks. That is why the CMP is selling virtually new late model rifles with new wood. You will pay extra for one of those ($895) , but these are the best bet for nice shooting M1 Garand.
The ones I picked up looked wonderful.
CMP ad:
M1 Garand, Service Grade HRA Special. $895
HRA collector grade metal in excellent almost new condition. Walnut stocks and handguards and associated hardware are new manufacture. NOT original HRA manufacture.