This is a "cutaway" grenade commonly used in military training to educate soldiers on the internal workings and mechanisms of the grenade.

Cutaway models of grenades help soldiers see and understand the internal components, such as the fuse mechanism, explosive filler, and the detonator. This deepens their understanding of how grenades operate.

By knowing exactly what happens inside a grenade when the pin is pulled, soldiers can handle live grenades more safely. Understanding the mechanical process helps in recognizing and mitigating risks during handling and operation.

Some military training might include tasks like disassembling and reassembling ordnance. Cutaway models provide a clear view and a safer way to practice these skills before handling live devices.

Visual learning is highly effective. Seeing the internal arrangement in a three-dimensional model can be more instructive than just viewing diagrams or reading manuals.

Knowledge of the internal structure can also aid in troubleshooting issues with grenades and performing routine maintenance.

These training aids are vital for thorough, hands-on understanding, which is crucial for the effective and safe use of grenades in military operations.