The SOCIMI AR-831 is an assault rifle of Italian origin based on the AR-15. The weapon is gas operated and is chambered in the 5.56×45mm NATO round.
See also Daewoo K2, another M16/AK derivative List of assault rifles
References
External links http://www.securityarms.com/20010315/galleryfiles/2900/2917.htm http://www.earmi.it/armi/atlas2/707.htm - Picture