That's been done, as has the .45 Winchester Magnum in a reworked M1 carbine, though recoil from that load eventually shatters the wood stocks. But another problem is that the wider cartridges reduce the magazine capacity to six or seven rounds when using the carbine's original 15-round magazine, and feeding reliability can be compromised if the curved 30-round mag is used.
But there's an Israeli bullpup stock arangement now available for the G.I. carbine, as the carbine is a polular weapon still widely used by civilian police reservists there. The real answer would be a light carbine specifically designed around the cartridge, a very real possibility if the *assault wweapons ban* sunsets at the end of next year.
And wouldn't a Calico 9mm M950-style pistol/carbine in 10mm with a 50-round magazine be interesting...?
