The machine gun became popular around the time of bolt-action rifles, and mass infantry charges. With the advent of assault rifles, mass infantry charges became a thing of the past. The future gun battle will be fought behind walls and barriers. In this case, the grenade launcher, like with the...
The earliest machine guns were designed for rapid firing, which is an advantage against slower reloading bolt-action rifles. In essence, the machine guns of the past can be considered the earliest designs of a modern assault rifle, just that they are much heavier. After the World Wars, armies...