Which M240B round is used for training in restricted local and urban training areas?

The M973 Short Range Training Ammunition, Ball, is specifically designed for use in training environments where safety and noise reduction are critical, such as restricted local and urban training areas. This type of ammunition provides the realistic firing experience needed for effective training but with a lower risk of over-penetration and minimal noise, making it suitable for close-quarter scenarios found in urban settings.

Using this ammunition allows military personnel to familiarize themselves with the M240B machine gun while adhering to safety protocols necessary for training in populated or constrained locations. Other options do not fulfill the specific requirements for restricted areas. For instance, blank rounds do not provide the same tactile feedback as live rounds, while dummy rounds are not capable of being fired, and standard ball ammunition can pose safety risks due to its capacity to cause greater damage and noise.