"Gas-operated" refers to a mechanism that uses gas pressure to perform a specific function, commonly found in firearms and machinery. In firearms, when a bullet is fired, some of the gas produced from the burning gunpowder is redirected to cycle the action, eject the spent cartridge, and load a new round. This system allows for faster firing rates and reduces the need for manual operation. In addition to firearms, gas-operated systems are also used in various machines, such as automobiles and lawn mowers. These systems enhance efficiency by utilizing the energy from gas to power different components, making them more effective and easier to operate.