The Valken Tactical Thunder V Beginner Package Starter Kit. Everything you need, besides CO2 cartridges, to get started. Includes one single main Core kit + 12 Pineapple Grenade style Shells. The core unit is reusable and compatible with all types of Thunder V shells and Thunder B (Hakkotsu). The Thunder V emits a loud 'boom' sound of 130DB 3-5 seconds after releasing its safety pin. No pyrotechnics involved, as it's only co2 powered. The outer cylinder shell will need to be replaced after each use. Easy to use and install. Read instructions first. Replacement parts, pins, etc are all available at Airsoft Atlanta for purchase.*Airsoft Atlanta is not responsible for any use, misuse, or damage caused by this product. Liability is on its user. Check with airsoft fields first before using. Do not throw at or near people.