I always thought the Carbine was a "fine" weapon with unrealized potential. It seems like The Allies already had the platform to create their own MP-44. I am not a weapons designer or a ballistics expert. But i would guess it would not have taken much more case capacity to transform The carbine into a more powerful rifle.? I was thinking a mere, additional, 1/4" - 1/2" of case length would have given the same bullet a new meaning. The Carbine, with more powder and full auto capability Would/Could have been an awesome rifle.