No, a thunderflash IS NOT A FLASHBANG.
A thunderflash is a military device to simulate a grenade. It has about the equivalent of a quarter stick of dynamite. It is a loud firecracker. The fuse does burn underwater, and it has a burn time of 4.5 sec (+/- 0.5 sec).
Having said that, I would not want to be on the recieving end of one of those underwater. Can anyone say Tennessee Fish Finder?
People often call Flashbangs Thunderflashes and vice versa. They are nowhere near the same thing.
Now an Arty Sim is a different story. It is an Artillery Simulator, and has a whistle fuse of approx 5-7 seconds. It is closer to a full stick, and will definitely fuck you up in close distances. Still not a very big flash of light, and a HELL of a lot longer fuse.
Just FYI
