it depends on Whitch ones you get. one you mix a citric acid powder with water which sets off a chemical reactios opening the topp and showering everything with bb's. the other i am not as knowlegeble in but uses similar principles but with gas.
Smoke Grendes
No.
No. Metal bb's will not work in airsoft guns.
Yes
NO
No
No
No. Paintball barrels are .68 caliber and have relatively huge threads compared to airsoft guns. Not only would they not fit, they would not work due to the large space between the barrel and the airsoft pellet.
AirsoftRC.com sells extra magazine's for this gun. Go to M06A1 airsoft gun magazine
No, they can not, do not attempt to mix real ammunition in airsoft guns.
ITS REALLY SIMPLE pull the pin
Airsoft and helicopters don't work well together because the wind from the propeller will blow the bb.