airsoftparts.ca just got them in.
http://www.airsoftparts.ca/store2/in...0267dc11dbbfce
If you look at the video on the Mad Bull site, the grenade is right next to the dB meter as MadMax said. That'd mean you'd only get the full 120dB if your head was right next to it. I'd like to see a measurement maybe standing a foot away from it or something which would be the worst-case scenario for indoor.