An airsoft grenade does not explode, it launcher BB's out of the launcher powered by gas.
If the smoke grenade operates on impact, then yes. However, it is a bad tactical idea, because if you have the desire to use a smoke grenade, then you are in the situation where you have enough time to pull one out.
NO.
ITS REALLY SIMPLE pull the pin
Simply refill them, yes.
Yes, but check before hand to make sure they can handle the pressure of Propane (they can if they can handle Green Gas or Top Gas)
It depends on the reason why they are
There is no safe way to make a grenade, even an Airsoft grenade can be dangerous if not made correctly, and making an explosive device is against Federal and Local laws. Better to get one that's already made.
No. Most are only available online and are for use with grenade launchers.
yes
you can get airsoft grenades on certain websites. never at a retail store or something of the sort. airsoft grenades is in the midst of a heavy amount of research at the moment. don't count on finding a call of duty airsoft grenade. but you can try.
It's about 350. Has very good range.