The irony is not lost on us, this model replicating a practice grenade thus being a dummy model of a dummy grenade. The real grenade does indeed detonate but only with a non-stun charge for use in exercises to simulate grenade-like activity.
This model is just a fake, nothing more then a well crafted replica dummy model. For display purpose only, this all metal model looks and feels very realistic. The pin and spoon lever can be removed but it performs no function otherwise.
Grenades like this are great for filling out vests, displaying on shelves or for theatrical use as they are of course far safer then actual detonating devices.