What is the second step in the cycle of operations after firing in the M16A2?

The second step in the cycle of operations for the M16A2, following the firing sequence, is unlocking. This stage is crucial as it involves the movement of the bolt carrier group. Specifically, after a round is fired, the pressure from the gas, which is diverted to cycle the action, initiates the unlocking process. During this step, the bolt rotates and unlocks from the barrel extension, allowing the spent cartridge case to be ejected efficiently. This process is essential for the overall cycle to continue smoothly and ensures that the weapon can effectively feed the next round into the chamber.

Understanding this step is also important to comprehend the functionality of the weapon. It connects the firing of the round to the subsequent steps of ejecting the spent casing and feeding a new round. Each of these actions is vital for the continuous operation of the firearm in a cyclic manner.