Does look preety cool, but yet it's like expensive i can have like 50 big macz wit that money lol. yet their is another type of grenade is called the AHG mabe by like sum spanish peeps it' uses baking soda wit water and citric acid to make a explosion to shoot bb's up ur pants. i got the link,-
http://www.airsofthandgrenades.com/AHGenglish/index.htm