The M249 light machine gun (LMG), formerly designated the M249 Squad Automatic Weapon (SAW), and formally written as Light Machine Gun, 5.56 mm, M249, is the American adaptation of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal (FN).
The Bren Gun, usually called simply the Bren, was a series of light machine guns made by Britain in the 1930s and used in various roles until 1992. Best known for its role as the British and Commonwealth forces' primary infantry light machine gun (LMG) in World War II,
Minigun - There’s nothing “mini” about this gun, which can fire 2,000 to 6,000 rounds per minute or 166 bullets per second. The only reason these bad boys are legal is if the weapon was manufactured and registered before May 19th, 1986, when the machine gun ban went into effect. Miniguns are pretty rare, but when they do go up for sale, they cost around $400,000