Which statement about the M16A2 rifle's operation is true?

The M16A2 rifle's operation being described as air-cooled is accurate because it utilizes a gas-operated, rotating bolt mechanism that relies on the surrounding air for cooling purposes during firing. This design helps manage the heat generated during sustained fire, allowing the rifle to maintain operational effectiveness without overheating.

Other statements do not accurately represent the M16A2's capabilities. While the rifle does have a manual reloading function (which is standard for most rifles), it is primarily designed for semi-automatic and three-round burst fire, not manual reloading in all firing scenarios. The assertion that the M16A2 can only fire single shots is inaccurate, as it features a burst mode that allows for controlled automatic fire. Lastly, the rifle is made with a synthetic stock rather than a wooden stock, reflecting modern military standards for durability and weight reduction.