How many lands and grooves does the rifling of the M320 have?

The M320 is designed with a specific rifling pattern that includes six lands and grooves. The number of lands and grooves in a rifle's barrel is crucial because it affects the bullet's stability and accuracy. Each land and groove helps impart a spin on the projectile as it travels down the barrel, which stabilizes the bullet in flight, improving range and precision.

A rifling pattern with six lands and grooves is relatively common in firearms, contributing to effective performance and handling characteristics. This particular configuration allows for a good grip on the bullet, enhancing consistency in trajectory while helping to minimize the wear and tear on the barrel over time.

The other options indicate different configurations of lands and grooves that are not characteristic of the M320. Understanding the rifling of firearms helps in better grasping overall firearm mechanics and performance capabilities.