Which of the following is not a phase of the cycle of function?

The cycle of function in firearms encompasses a series of phases that occur when a firearm is discharged and then prepared for subsequent shots. Each phase plays a critical role in ensuring the firearm operates smoothly and effectively.

Discharging is indeed a key phase of this cycle, as it pertains to the actual firing of the cartridge, igniting the propellant and pushing the projectile down the barrel. However, the term "discharging" refers specifically to the act of firing and is not typically included as a distinct phase within the cycle of function framework.

The phases of the cycle of function generally include chambering (the process of loading a round into the chamber), ejecting (the removal of the spent cartridge from the chamber), and extracting (the process of pulling the spent cartridge from the chamber). Since discharging does not fit into this sequential framework of operational phases, it is identified as not being a phase of the cycle in this context.