Better keep your English captions on if you still have your YouTube player still open as here's another review from the French Language airsoft channel "Airsoft Review". This episode is a review of the Kyou Airsoft 40mm CO2 Grenade Detonator, or a CO2 Grenade Shell for us. Kyou Airsoft is actually a French Airsoft company in case you will think of it as a Japanese one or TV station in the U.S. Midwest.