M777A2 Howitzer Practice Test

The primary function of the M51 firing mechanism is to ignite the propellant charge. This ignition is crucial because it initiates the whole firing sequence. When the trigger is pulled, the igniter within the M51 activates and ignites the propellant charge, generating high-pressure gas that propels the projectile out of the barrel at a high velocity. This ignition process must be reliable to ensure accurate and effective fire missions.

While stabilizing the round in flight, guiding the projectile, and absorbing recoil are important aspects of artillery function and design, they are not the primary function of the firing mechanism itself. Instead, they pertain to other systems and components of the artillery piece that ensure the projectile flies correctly and that the crew experiences minimal disturbance during firing. Understanding the firing mechanism's role is crucial for comprehending how the entire artillery system operates effectively.