Canadian Firearms Safety Course (CFSC) Practice Exam

The correct option highlights that the explosive action of the primer ignites a small charge within the cartridge, resulting in a flame being projected into the case. This flame serves to ignite the main powder charge, which ultimately generates the gas needed to propel the bullet down the barrel at high speed.

In firearms operation, the role of the primer is crucial. When the firing pin strikes the primer, it creates a small explosion that ignites the powder inside the cartridge. This ignition is necessary for firing a bullet, as no combustion means no gas pressure to push the bullet out of the casing.

This interaction is fundamental to the entire firing sequence, as it initiates the combustion process that leads to the bullet's propulsion. Understanding this mechanism is essential for safe handling and operation of firearms, as it ensures that users recognize the role of each component in the firing process.