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. The selector switch is positioned on the right rear of the receiver, with positions for semi-automatic, three round burst, and fully automatic. Smooth hardwood stock, with vented synthetic upper cover, checkered pistol grip and folding metal buttstock.