Contemporary design type special purpose grenades, VFC gives us dummy grenades which double as gas chargers. With metal housings they offer a good robust structure to resist those inevitable bumps and scrapes.
Large type grenade to emulate such special purpose grenades as smoke canisters and white phosphorus incendiary devices, these grenades are a nice aesthetic touch to add to grenade pouches. In this case, this model replicates the M18 colored smoke grenade canister.
These can also be gassed up with HFC 134a, Green / Top gas or Red gas for use as a convenient in-game gas top-up supply. These models do not have the right seals or valves to handle CO2 pressure.