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This is a 12-Shell pack of refils for the Thunder B CO2 Sound Grenades. Thunder B Airsoft simulation grenades that emit a very loud noise for an awesome effect! It keeps a standard 12g CO2 cartridge in a fully sealed metal compartment, upon the pin being pulled, the fire lever will release the pressure from the CO2 cartridge until the shell breaks due to air pressure inside the shell. Resulting a loud sound. Each shell is one time use (Please properly dispose shells after usage). When the Thunder B CO2 Grenade And Sound Flash is not loaded with a CO2 cartridge, it is a great decoration and/or a bb holder!

These are replacement shells for the CO2 powered Sound Grenade which means that it uses CO2 Gas as a propellant. This CO2 is solely for use of a sound effect. Using anything else as a propellant for this gun will void the warranty and may cause it to jam and/or break. You must be 18 years of age or older to purchase this Airsoft gun accessory. You will need to purchase CO2 for this sound grenade separately.


  • CO2 Powered
  • Plastic Construction
  • Realistic Sound Effect
  • 130db BANG Sound Level


  • 12 Thunder B Airsoft Grenade Cylinder Shells
  • REQUIRES: CO2, Compartment, Fire Lever, Safety Pin


  • Length: 2.25 Inches
  • Width: 2.25 Inches
  • Height: 5 Inches


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