What are the four parts of a round?

The correct answer identifies the four essential components of a round fired from a firearm or artillery piece. The components named are the projectile, propellant, primer, and case.

The projectile is the part of the round that is expelled from the barrel and is designed to hit the target. The propellant is the chemical substance that burns to create gas and pressure, propelling the projectile out of the barrel at high speed. The primer is a small explosive device that ignites the propellant when struck by the firing pin. Finally, the case is the container that holds all these components together and provides a seal to maintain the integrity of the round until it is fired.

Understanding these components is critical in grasping how ammunition operates and is necessary for effective weapon handling and maintenance in various military situations.