The Tornado from Airsoft Innovations gets its second generation version with the Tornado 2 Timer Frag Grenade and it's now on pre-order... "NEW PRODUCT RELEASE: After years of development and customer requests, Airsoft Innovations is proud to launch the TORNADO 2 Timer Frag Grenade.

It's the most powerful frag grenade in airsoft ever, featuring the largest BB payload, easy reliable timer, and full metal construction.

Fully reusable, runs off of GreenGas/propane, no disassembly or maintenance required."