Step and Release Gas Powered Landmine Shell Developed for military / tactical training use and similar to real landmines, The gas powered shell landmine is triggered When foot pressure is applied to the gas landmine and activates with a loud bang to simulate an explosion When the foot is released. Durable, reusable, easy to "maintain and operate, this unit is used to offer a realistic simulation of a battlefield experience. This unit is compact in size and can explode with 10 lbs of pressure Allowing for a 90dB sound volume (with CO ?) and a 3.5 cubic meter blast volume. The unit is shipped with a cloth bag for convenience. To charge the unit with CO ? gas, S-Thunder"s CDC series CO ? cylinders with adapter is recommended (Sold Separately) SPECIFICATIONS: Size: 11cm diameter, 6.7cm height Powered by: CO ? or Top Gas Filler: Water or Color Powder Filler Volume: 48ml Net Weight: 490g Shipping Weight: 613g