MK19 40mm Grenade Launcher Machine Gun in Action Shooting - Automatic Belt Fed fired by US Troops

This video clip shows an MK19 Automatic Grenade Launcher being test fired by US Combat Troops. A machine gun is defined as a fully automatic mounted or portable firearm, which is normally designed to fire bullets in quick succession from an ammunition belt or magazine, at a rate of several hundred rounds per minute, or more with modern weapons. From earlier attempts to create a reliable rapid-firing weapon it was not until the mid-19th Century, when Richard Gatling invented the Model 1862 Gatling Gun which was used by the US Navy. Machine guns are generally grouped into 3 main categories: Submachine Guns; Machine Guns; and Autocannons. The difference between machine guns and autocannons is based on caliber, with autocannons using calibers larger than 16 mm. A notable development in machine gun technology was the minigun, which in the case of the M134 Minigun has a 7.62 mm, six-barreled machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). It features Gatling-style rotating barrels and is powered by an electric motor. A variant of this is the GAU-17/A which is widely used on US helicopters and rapid assault boats. This video clip shows an MK19 Automatic Grenade Launcher being test fired by US Combat Troops. The MK19 replaced the earlier MK18 hand-cranked multiple grenade launcher.