Which of the following is a type of High Explosive (HE) round?

The M795-TNT is classified as a type of High Explosive (HE) round due to its primary composition of TNT, which is known for its reliable detonation properties and significant explosive effect. High Explosive rounds are designed to cause damage through blast and fragmentation, making them effective in various combat scenarios. The M795 specifically is used in artillery applications and is intended for use with the M777 and other howitzers, delivering enhanced lethality against both personnel and hardened targets.

In contrast, the other options listed do not fall under the category of High Explosive rounds. The M506 is generally associated with a different type of projectile used primarily in training or non-explosive roles, while the M320 typically refers to a grenade launcher rather than an HE artillery round. The M120 also does not represent a standard HE round in the military arsenal, focusing instead on other functionalities. This distinction is important for understanding the application and effectiveness of different types of munitions in combat scenarios.