Which component is necessary for the M14 to operate correctly?

The gas system is essential for the M14 to operate correctly because it plays a critical role in the rifle's semi-automatic and automatic firing functions. The M14 utilizes a gas-operated mechanism that relies on gas from fired cartridges to cycle the action, eject spent cartridges, and chamber new rounds.

When a round is fired, some of the gas from the burning gunpowder is redirected through a port in the barrel into the gas system, which then pushes a piston. This action drives the bolt carrier backward, enabling it to eject the spent cartridge casing and chamber a new round. Without the gas system functioning properly, the M14 would fail to cycle reliably, causing malfunctions in firing and feeding new cartridges.

While the stock, barrel, and receiver are all important components that support the overall integrity and function of the rifle, the gas system is specifically what allows the M14's semi-automatic operation to occur smoothly. Therefore, its proper function is crucial for the rifle's reliability and efficiency during use.