Is the M320 a breach-loaded weapon that can only be fired independently?

The M320 is indeed not restricted to independent operation, which makes the assertion in the question false. The M320 is a versatile grenade launcher that can be attached to various platforms, such as the M4 carbine, and it can also be fired as a standalone weapon. This ability to operate while mounted or independently highlights its flexibility on the battlefield.

In addition, the M320 is designed for both single-shot and automatic fire modes depending on the specific configuration used. This adaptability is a significant factor in its design, allowing soldiers to employ it in different combat scenarios without limitation to independent firing only. Thus, the correct response is rooted in the understanding of the operational capabilities of the M320.