or a "W" indicating it's a Winchester Barrel (see photo 7). Don't be concerned if the manufacturer of the barrel isn't the same as the manufacturer of the receiver, some manufacturers used barrels made by other
I submitted a post yesterday that has disappeared into the ether. I wanted to advise WWII carbine owners that it is very common to see parts from different manufacturers and component suppliers on original M1s. The government often shifted parts around to keep production on schedule at each plan...