I didn't read all the responses but the course of WWII would not have been altered by the effectiveness of either side's small arms. Tanks, artillery, ships, and aircraft and the ability to build a lot more of these than the other side is what determined the outcome of WWII.
FWIW, I would prefer a sub gun that fires from a closed bolt (think MP5) over a M1 carbine. I've fired a MP5 enough to know its fairly accurate at 200 meters. If you limit me to a sub gun that fires from an open bolt I'd take the M1 carbine.
FWIW, I would prefer a sub gun that fires from a closed bolt (think MP5) over a M1 carbine. I've fired a MP5 enough to know its fairly accurate at 200 meters. If you limit me to a sub gun that fires from an open bolt I'd take the M1 carbine.