CMP is 100% reliable and legitimate. And they
help if you have a problem, they really stand behind what they sell
Highly recommended. But do not expect to get a
new rifle. These are military surplus. They have clear grade definitions on their website
http://www.thecmp.org/m1garand.htm
Here's my CMP Service Grade M1. 1944 Springfield receiver, 1946 Springfield barrel. Arsenal rebuilt at Rock Island Arsenal after the war. The wood is all USGI walnut but be forewarned the wood did not look anywhere near this nice when I got it, although the stock is the stock I got on the rifle. I found nicer matching handguards.
This is what the magazine looked like when I got it- too clean to really clean it. Most are packed in cosmoline still; mine was reparkerized and subsequently clean
Wartime production
Glamour shot with my Dad's M1903A3