Which of the following is not one of the 4 f's in firearm operation?

In firearm operation, the four essential functions are often referred to as the "4 F's": Feed, Fire, Eject, and Extract. These four processes are critical for the proper functioning of a semi-automatic or automatic firearm.

The function of feeding refers to the process by which a round is moved from the magazine into the chamber, allowing the firearm to be prepared to fire. Firing is the actual act of discharging the round to propel the projectile. Ejection involves the removal of the spent casing from the chamber after firing, allowing for the next round to be fed into the chamber.

Control, while important in the context of handling firearms safely and ensuring accurate shooting, is not part of the core operational functions of a firearm. Instead, it pertains more to the shooter's ability to manage the weapon effectively during operation.

Thus, identifying control as not one of the 4 f's is accurate, highlighting its role as a broader concept related to firearm handling rather than a specific operational function inherent to the mechanics of the firearm itself.