Type recommended by the maker of the airsoft.
Airsoft bbs are made up of plastic and are 6mm in diameter and are .24 cal, BBs however are metal and are .177 cal (4.5mm)
The stinger p9 is good with .12 gram airsoft BBs or you can use .25 gram bbs but then it will decrease the range.
you can not use metal bbs in airsoft guns at all. they are not compatible because they are both built differently.
Only when you are out of bbs in your magazine
no
All airsoft guns usually use 6mm BBs, usually made of plastic, and come in a variety of different weights (.12 grams, .20 grams, .25 grams, .28 grams). Normally .12 gram BBs are the cheapest, and are good for most airsoft guns, although airsoft guns that shoot at higher velocities should use .20 or .25 gram BBs, as they will shoot straighter.
yes they are very accurate
.25 Airsoft bbs can be good. Their weight is very good for accuracy and helps for a harder hit from the bbs. However, no bb is good if they are not high polish. Companies like Madbull and Matrix make good .25 bbs.
No
no
Yes
NO.