Don’t forget Winchester as a Garand producer!
Interestingly, the Japanese went through many of the same designs as Springfield had studied in the 1920s, during their own desperate effort to develop a semiautomatic rifle. (The Japanese Navy’s design team finally settled on a near copy of the Garand, and began production in 1945; it is believed that no more than twenty of the rifles were completed before war’s end.)
The Winchester M1 Carbine receiver was different from other producers, such as the Inland Division of GM. The operating slide guide and spring were contained in a tube that fitted in a trough in the bottom right side of the receiver. By contrast, the Inland Division receiver eliminated the trough and tube by making them part of the forging. A simple bored hole replaced the tube to hold the spring and guide. Interestingly, the original wooden M1 Carbine stock was replaced by a hand carved Vietnamese replacement.