Which system is commonly used for infantry training?

The M16 rifle is the primary weapon system used for infantry training across many military branches. As a versatile firearm, it is designed for a variety of combat situations and provides soldiers with essential marksmanship skills. The M16 plays a crucial role in familiarizing soldiers with the fundamentals of rifle handling, shooting positions, and precision shooting, which are vital skills for infantry personnel in the field.

Additionally, the training with the M16 rifle encompasses various aspects such as weapon maintenance, safety protocols, and tactics. This comprehensive approach ensures that soldiers are well-prepared to utilize the weapon effectively during operations. The M16's widespread adoption in infantry training makes it a foundational element in the development of effective soldiers, enhancing individual and unit performance in combat scenarios.

Other choices, while they serve distinct purposes, do not primarily focus on infantry training. The M107 sniper system is specifically for long-range engagement, the PTA emphasizes physical fitness rather than combat skills, and the Javelin is an anti-tank guided missile system used primarily for engaging armored threats and not for general infantry training.