Forgot to mention, that since pumps have a straight tube magazine, they could only be made to shoot flat nose bullets, or blunted soft point bullets. (Otherwise, the pointed nose of one bullet, sitting on the primer of the round in front of it, could cause that round to go off, and blow up the gun.)
So, this would rule out a pump carbine for the .30 carbine, and any other cartridge with pointed ammo.
(Exception would be if they made the tube much bigger around, with a spiraled metal insert, so that the rounds do not line up exactly on the primers of the ones in front of them. But, this would be expensive, and may hinder feeding.)
The worlds of pistol-round carbines is totally ruled by the lever actions, particulary Marlin and Puma.
Regards,
Mannyrock