Not quite sure what you are saying ? No they are not an " original " Mauser anything . They were put together using surplus parts in France . How is the "barreled action " shortened ? The action is the normal length and it is a replacement barrel . Of my three , the two " long " rifles are in M-71 stocks that have been shortened a little , and my Short rifle is in a Very short M-71 stock . What stocks are your's in ?