Mitrailleuse
A mitrailleuse (; from French "mitraille", "grapeshot") is a type of volley gun with multiple barrels of rifle calibre that can fire either multiple rounds at once or several rounds in rapid succession. The earliest true mitrailleuse was invented in 1851 by Belgian Army captain Fafschamps, 10 years before the advent of the Gatling gun. It was followed by the Belgian Montigny mitrailleuse in 1863. Then the French 25 barrel ""Canon à Balles"", better known as the Reffye "mitrailleuse", was adopted in great secrecy in 1866. It became the first rapid-firing weapon deployed as standard equipment by any army in a major conflict when it was used during the Franco-Prussian War of 1870–71. A steel block containing twenty-five 13 mm (.51 calibre) centre-fire cartridges was locked against the breech before firing. With the rotation of a crank, the 25 rounds were discharged in rapid succession. The sustainable firing rate of the Reffye mitrailleuse was 100 rounds per minute. The maximum effective range of the Reffye "mitrailleuse" was about 2000 yards; a distance which placed their batteries beyond the reach of Prussian Dreyse needle rifle fire. Reffye mitrailleuses were deployed in six gun batteries and were manned by artillery personnel. They were not infantry support weapons, but rather a form of special artillery.
Mozambique Drill
According to anecdotal history, the technique originated with a Rhodesia soldier, Mike Rousseau, engaged in the Mozambican War of Independence (1964-1974). Fighting at the airport at Lourenço Marques (modern-day Maputo), Rousseau rounded a corner and encountered a FRELIMO guerrilla, armed with an AK-47 assault rifle, at 10 paces (~7.5 meters). Rousseau immediately brought up his Browning HP35 pistol and performed a double tap maneuver, a controlled shooting technique in which the shooter makes two quick shots, to the target's torso. Rousseau hit the target on either side of the sternum, usually enough to incapacitate or kill outright. Seeing that the guerrilla was still advancing, Rousseau attempted a head shot that hit the guerrilla through the base of his neck, severing the spinal cord. Rousseau related the story to an acquaintance, small arms expert Jeff Cooper, founder of the Gunsite Academy shooting school, who incorporated the "Mozambique Drill" into his modern technique shooting method.