M1 carbine

[Jason Yan]

An overgrown .22. as the American soldiers in WWII named it. Became popular with tank crews, paratroopers, and other [special purpose] soldiers (such as engineers, radiomen, [mortar] carriers, etc.) Was fully taken out of the U.S Military around the Vietnam War, and has now made its way to the hands of police forces all over the world. It is also being sold by various companies on the civilian market.
It fires a .30 [Carbine] round, and has a barrel length of 18 inches. From the beginning of the war to the end there were over 6 million produced by many companies, alot of which are familiar to us today:
IBM- Computer company (most likely converted to a war-time factory)
Winchester
General Motors
[Underwood]
Rock-Ola
Quality Hardware
Standard Products
Irwin-Pederson