The first mass produced Airsoft landmine in the market.For safty reason, we design this landmine for generating powder only.We suggest customers to use flour or corn starch as the powder for safety and environmental reasons.CO2 is best for the powder shot. (LOUD!)However, you still can use Green gas or Red gas.NOTE:(1) Please remember to remove the "safety ring" to fire the powder shot. (2) Please read instructions before use.(3) For best performance and for safety reasons, please don't cover the device by sharp objects, stones, or even B.B.s.