'loco_engr' - Looking at your first photos again, your altered Krag carbine stock is the replacement (circa 1900) 'long-forearm' type. These were replacement stocks, similar to the 1899 carbine stock and would lack a 'cartouche' and carbine sling-bar. They use the same barrel-band and longer hand-guards that were used on the model 1899 carbines.
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