Deep Fire MK2 Gas Grenade which realistically simulates a handgrenade for airsoft purposes. Simply fill it with gas from the fill-valve in the bottom of the grenade, fill it with BBs and you're ready to rock! Pull the pin out, and throw it towards a target of your choice and a few seconds later, the BBs are ejected out with a nice bang.The Deep Fire grenade is easy to maintain, and can be disassembled quickly and easily. The shell pieces are made using durable ABS plastic, making them extremely durable.