Only government/Director of Civilian Marksmanship (sales) paperwork can validate such a Krag.

The "NRA-DCM" (22inch) carbines with 1903 front-sight exist, but, they are easily faked or duplicated and only identifiable with documentation.

A 24 inch (barreled) arsenal produced Krag, with a carbine stock and 1903 front-sight is very dubious.
FWIW - (I have never heard or read of such an 'official' model).

Such a Krag could be easily fabricated (and many were), by civilian owners and dealers, for Hunting.

The posted paragraph is a very questionable source without further details and supporting evidence.

BTW - The 22" DCM carbines are believed to have been produced at and documented to have been shipped from Benicia Arsenal, in California.