American-180

A semi-automatic only variant called the American SAR 180/275 is still produced on a custom basis by E&L Manufacturing of Riddle, Oregon.

The weapon operates through a conventional blowback mechanism. It uses an open bolt with a flat pan magazine. It fires at a very high rate of fire of approximately 1,200 rounds per minute. The American-180 was purchased mostly by private parties prior to the Hughes Amendment in 1986, which banned the production of automatic weapons for the American civilian market. The A180 was adopted by the Utah Department of Corrections to arm prison guards.

Twin-barrelled variant: The ILARCO company manufactured the American 180 in a twin-gun configuration. The two receivers were mounted on a single stock that weighed more than 14 lb (6.4 kg), with a rate of fire over 3,000 rounds per minute. Quad-barrelled variant: The ILARCO company manufactured the American 180 in a quad-gun configuration. Each of the individual guns could be fired in a variety of combinations. The guns could be fired one at a time, or one on the left and one of the right, or all at once. It was mounted on a large tripod, with a rate of fire from 3,000 to 12,000 rounds per minute.

Croatia: MGV-176 Slovenian-made copy, used by Croatian Guerilla forces during the Yugoslav wars France: two were used respectively by the GIPN of Marseille and the Research and Intervention Brigade of Paris in the 1980s. New Zealand: New Zealand Police Anti-Terrorist Squad, issued in September 1978 and no longer in operational service. Rhodesia: Rhodesian SAS. South Africa: 4th Reconnaissance Regiment. United States: Various law enforcement agencies and correctional facilities.