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Intense light and sound
Pin and spoon
- "What the hell just happened!"
- ―Rodney McKay upon a flashbang's detonation.
Stun grenades, also known as flashbangs, are non-lethal weapons used by the Tau'ri.
Stun grenades take 1.5 seconds to detonate once the pin releases the spoon and it detaches from the grenade. They are filled with a mixture of aluminum and potassium perchlorate which, when ignited, produce a high-pressure wave with intense light and sound to temporarily overwhelm the intended target's sight and hearing for approximately ten seconds. The light is 2.4 million candle-power and the sound 175 decibels. (SGA: "Suspicion", "The Brotherhood")
The Atlantis expedition used flashbangs against the Wraith and the Genii. Within the first few weeks of operation, in 2004 they used them to ambush the Wraith in the hopes of capturing one, by stunning a Wraith warrior, and later tasering him. Unfortunately for them, the warrior managed to blow himself up before capture. Later in 2005, Major John Sheppard's team used spare flashbangs against Acastus Kolya and his fellow Genii to prevent them from stealing the Potentia—a Zero Point Module—the expedition needed to power Atlantis. (SGA: "Suspicion", "The Brotherhood")