Since anyone with a bit of skill could 'cut-down' a Kragicon rifle and alter it to the "DCM/NRA - Carbine" configuration, a 'real one' can not be identified for certain, without original DCM shipping-paperwork or 'bill of sale'.

IIRC - these DCM Krags, altered for 'Sporting Purposes', were altered and shipped from Benicia Arsenal, near San Francisco, in the 1920's.

These rifles initially utilized model 1899 carbine stocks, until the supply of carbine stocks ran out. Then, rifle stocks, were shortened to carbine stock length and the exposed channel in the stock tip was plugged.

FWIW - The workmanship on a Benicia altered "DCM carbine" should be first rate. A lot of 'cut-down' Krags lack skilled crowning of the barrel muzzle and fitting of the 1903 front-sight.

I noticed you also posted on the KCA Forum.

The "CA" stamp on your stock is not exactly known. One belief is that various 'Letter Combinations' and stamps were used to identify the Depot or Arsenal, that did the work of Rebuilding or Reconditioning Arms, in the preparation period before WW1.

To me, these odd markings are a bit of a head scratcher. The exact meaning begs to be documented. They appear to date from after Krag production ceased at Springfield Armory, 1903-1904.