This was manufactured circa 1970/80s when they were being produced by The Auto-Ordnance Corp. in West Hurley, New York, based on the original Thompson M1A1 SMG using new manufacturing steel and techniques. The receiver has the standard markings of: "THOMPSON SUBMACHINE GUN/CALIBER 45 M1/NO. M492A". The right side is marked: "AUTO ORDNANCE CORPORATION/WEST HURLEY, NEW YORK, U.S.A.". As noted, this lot is only the "bare stripped" barreled receiver with the ejector and forend hanger. It is unusual to find one of these full auto receivers for sale on the market, and one should be able to acque a surplus part set on the secondary market.