Hakkotsu are the pioneers in making a viable, affordable airsoft flashbang style sound distraction device. Their reusable core design and variety of single-use shell styles make adding these grenades to any loadout quick and easy. This variety pack includes the classic SOUNDFLASH cylinder, Cylinder C with reusable protective time-delay endcaps, and a military style pineapple grenade shell. The reusable core holds a single 12g CO2 cartridge (sold seperately). To use once assembled, simply pull the pin, throw, and watch the competition flee from a deafening bang. These variety packs are a great way to affordably get a core as well as different shell styles to try out and find your favorite.