ultrasonic airsoft bb's are usually made with little or no seam in the BB. When there is a seam in the BB(usually found in the cheaper kinds) the BB will tend to curve unpredictably. If you want a more accurate BB go for .20gram or even .25gram for higher quality guns. .12grams will tend to curve no matter what.
Ultrasonic is just used to catch peoples attention from a company called cybergun. there not any thing special or different from outher low grade bbs.
Any airsoft gun. Yes
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)
Type recommended by the maker of the airsoft.
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 buy airsoft paintballs, but they're the size of a small pellet and I've had a hard time finding them. Technically no. There are NO paintballs that work in an airsoft gun. The answer above was partially correct though. They make marker bbs that are basically bbs but they have paint on them.
No. It's not designed to shoot them.
any bbs will work in any gun i prefer .20 gram crossman whites
you can not use metal bbs in airsoft guns at all. they are not compatible because they are both built differently.
no
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