Yes, the stock is genuine as far as I can tell. The carbine it held was involved in a rebuild and the high wood was cut down as per the orders to make it a low-wood. Then it received a rebuild mark. Consequently, you would find an updated carbine in that stock after the rebuild. This means an Inland carbine in original configuration would not normally be found in a stock with a rebuild mark, so any M1 Carbine could have been found in that stock after the rebuild. The absolute best carbine you could put in the stock would be an Inland from either serial number bloc for M1A1 production but in rebuilt configuration. A Saginaw would be great too. The import mark is fine - it simply reduces the value because it could not exist on a carbine that did not leave U.S. custody until it was sold by the DCM. It means that carbine was given to some other country. Later, that country surplussed it out and an importer bought it and brought it 'home' to the USAicon to sell.