Which sequence is part of the functioning cycle of a firearm?

The sequence that is part of the functioning cycle of a firearm is firing. In the context of firearms, the functioning cycle refers to the series of actions that occur from the moment the trigger is pulled until the spent cartridge is ejected, and a new round is chambered, preparing the firearm for the next shot.

Firing is the initial critical phase within this cycle, as it involves the ignition of the primer, which causes the gunpowder to ignite, generating gas that propels the bullet down the barrel and ultimately exits the firearm. This action is fundamental to the operation of any firearm and is directly connected to its primary purpose—discharging ammunition.

Other options, while relevant to firearm handling and maintenance, do not directly pertain to the immediate operational cycle. For instance, loading refers to the process of inserting ammunition into the firearm, which precedes firing but is not part of the actual firing sequence itself. Cleaning is essential for maintaining the firearm's functionality and performance but occurs after shooting, not as part of the active cycle of firing. Holstering is related to the safe storage and transportation of the firearm but does not influence its mechanical functioning cycle.