The recoil causes new shots

When an automatic weapon is fired, gunpowder gases cause a pressure inside the weapon that reloads it. As the pressure is lower in the case of blank cartridges, the weapon must be equipped with an amplifier.

1 The weapon is at rest with a live cartridge in its barrel. At the front of the cartridge, you will find the bullet (red). Blank cartridges are 5-7 mm longer than live ones. The bullet is replaced by a flattened point. 2 When the trigger is pulled, a spring darts forwards, hitting the percussion cap at the back of the cartridge. Both live and blank cartridges include gunpowder, that is ignited. The gunpowder gas increases the pressure, and the bullet is fired. The reverse force of the 3 pressure makes the spring dart back, so the empty cartridge case is released, and a new cartridge is introduced. In the case of blank cartridges, the force is reduced, and an amplifier must be installed in the barrel.