Wood! Especially being an M14 copy. I wish I could afford an M14A.
Even in the army I eventually was a Squad Designated Marksmen, but I carried an M16A4 semi auto with a longer bull barrel amongst other things. But that caliber I would have preferred. I had to compensate sooo much for drop at distance using the 5.56 it was stupid. It's an accurate round within 300 meters but beyond that you really have to know what you're doing.
As I understand it the marines carried the M14 commissioned as their SDM(by a different term?) and that round is far more effective at range. But I will say, especially for civvie use,the wood is effin SEXY and reduces recoil. I never cared for synthetic stocks, especially those in ridiculous cammo pant, etc etc.
Personal preference, but the solid and even laminated will hinder recoil due to weight of stock. And look immensely better!!!