The 40MAX Whirligig II airsoft grenade is available in Japan and Maydaysan Airsoft got one to whirl... "Today, checking out the 40 MAX Whirlgig II Airsoft Grenade, this thing should be banned. It has  unique spin mechanism and solid blast radius which makes it too good. Whether you’re clearing rooms or just adding some chaos to your game, the Whirlgig II delivers.

It’s built tough, reliable, and definitely worth having in your airsoft arsenal, however be careful using it because of its metal build. Stay safe, and have fun!"