This is a Colt "Model of 1911 U.S. Army" mfg in 1913.
Five digit serial number 183xx. Overall working condition is awsome, very tight, bore is clean and yes original barrel as well as all other parts and grips. Some blueing wear as expected in a 100 year old gun. I would say retains at least 70+ blueing with no rust or deep pitting. Has one two tone mag. and original holster although I can not find any mfg markings on it. Hate to sell, may change mind so act quick before I decide to keep this piece of history.