What type of round contains a pyrotechnic charge and simulates service ammunition with a flash bang signature?

The M918 Target Practice round is designed specifically to simulate the effects of service ammunition while incorporating a pyrotechnic charge that produces a flash bang signature upon detonation. This feature allows for realistic training scenarios without using live ammunition, making it safe for use in combat training environments. The flash and sound mimic the effects of actual gunfire, helping to prepare troops for the sensory experiences they might encounter in combat.

The other options, while they may serve various training purposes, do not offer the same pyrotechnic attributes that simulate a true service round with the accompanying flash bang effect. M100, M67, and M197 rounds have different specifications and uses that do not include the pyrotechnic charge associated with the M918. Therefore, the M918 is the optimal choice for training that aims to provide a more authentic experience simulating combat conditions.