I think it's an M1A1 Carbine, not an M1 Carbine.
Just behind the receiver, you can see a drop where I think the metal frame starts. With the wood stock, it continued in a flowing line from the back of the receiver and didn't have a drop. I also seem to see uniform where if it had a wood stock you wouldn't see this.
The handguard and the front of the stock is a different colour to the rear stock in the top photo when it should all be the same colour of wood if it was an M1.
The M1A1 was used by US paras because of the folding stock and it could fold down to 25.51 inches instead of the normal length of 35.63 inches.
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