What is the purpose of the firing pin in a firearm?

The firing pin plays a crucial role in the operation of a firearm, specifically in the ignition process. Its primary purpose is to strike the primer of the cartridge when the trigger is pulled. This impact creates a small explosion in the primer, which in turn ignites the gunpowder within the cartridge, leading to the firing of the bullet. Without the firing pin, the firearm could not successfully initiate the firing sequence, making it an essential component in the discharge of the weapon.

The other functions listed, such as ejecting the cartridge or loading another round, are carried out by different mechanisms within the firearm's operation. Stabilizing the bullet is also not a function of the firing pin, as this is typically achieved through other design features of the firearm and ammunition.