Which component is NOT part of a cartridge?

• A. Primer
• B. Propellant
• C. Barrel
• D. Projectile

Answer: (C)

A cartridge is a complete unit of ammunition that contains several essential components necessary for its function. It typically includes a primer, propellant, and projectile.

The primer is a crucial element that ignites the propellant when struck, typically by the firing pin of a firearm. The propellant, often in the form of smokeless powder, generates the gas pressure needed to propel the projectile out of the barrel when ignited. The projectile is the actual bullet or other projectile that is launched from the firearm upon firing.

In this context, the barrel is not a component of the cartridge itself but is rather a part of the firearm that houses the cartridge during firing and guides the projectile out of the gun. Therefore, identifying the barrel as not being part of a cartridge is accurate. Understanding these distinctions between the components of a cartridge and the parts of a firearm is essential for grasping the functioning of ammunition and firearms.