What is the maximum effective range of the M4 Rifle for semiautomatic fire?

The correct answer reflects the maximum effective rate of fire for the M4 Rifle when used in semiautomatic mode. The M4 is designed to maintain precision and accuracy while engaging targets at a manageable rate. In semiautomatic mode, a trained shooter can achieve an effective firing rate of approximately 45 rounds per minute. This rate allows the soldier to control their aim, follow-up shots, and maintain accuracy over time, which is critical in combat scenarios.

While other rates of fire are mentioned, they either exceed what is practical for sustained semiautomatic shooting or are not representative of effective engagement capabilities. Thus, the selected answer encapsulates the balance between speed and precision necessary for effective use of the M4 in semiautomatic fire.