That was part of it, but if you actually look into it, it was also because of its short range, and that it was more of a submachinegun to him (that's why it was briefly called "MP-44", to sneak it past him).
>Pistol caliber carbines are often longer than any submachinegun.
Simply an artifact of gun control.
>There is no long version of an M1 Carbine.
M1 Abrams
Pistol caliber carbines are often longer than any submachinegun.
It's more about portability and lightness than a shortening alone.
There is no long version of an M1 Carbine.
A semiauto AR15 is a far more capable firearm than the Thompson Submachinegun (which was "the" machinegun that the NFA meant to ban).
The machinegun "dangerous" counterfactual is silly, especially in the era of FRTs and the like.
The point of a submachine gun was a high volume of fire in an Era when the standard issue infantry rifle was (mostly) full size cartridge manual bolt actions or semi auto rifles.
Once intermediate cartridges and shorter barreled carbines became more common most people with submachinegun use cases strted switching to short barreled carbines.
There was a period where some guys HD the idea that combt support and service support could be issued SMGs or PDWs, hence the development of weird chamberings for PDWs, but they didn't catch on for one glaringly obvious reason: it's easier and cheaper to have as few chamberings between issued weapons.
Then they should start manufacturing them right away. A Luty submachinegun can be manufactured with basic tools in a couple of days. Blueprints can be downloaded.
youtube.com/watch?v=sIhGCRIQ…