Manufactured from 1979 to 1999 and marketed to law enforcement and foreign military clients, the AC-556 family of weapons is the Mini-14 .223 caliber rifle configured as a factory original selective fire machine gun. Fitted with a birdcage flash hider, blade and adjustable peep sights and standard receiver markings. The selector switch is positioned on the right rear of the receiver, with positions for semi-automatic, three round burst, and full automatic. Smooth hardwood stock, with vented synthetic upper cover, checkered pistol grip, and folding metal buttstock. Includes a cased Ciener .22 caliber conversion kit which appears to contain all the components including two .22 caliber magazines, a generic soft case, manual, and pouch of tools.