The Auto-Ordnance M1 .30 Caliber carbine is produced in Kahr's state-of-the-art manufacturing plant in Worcester, MA. The Auto-Ordnance carbines are produced using newly manufactured parts on high precision computerized machinery. Markings include the following: Auto-Ordnance, Worcester, MA behind the rear sight; U.S. Carbine, Cal. 30 ML on the receiver in front of the bolt and the serial number is engraved on the left side of the receiver. Not legal to sell in certain states. However, local laws may also prohibit this firearm. Please check with your local law enforcement agencies.