6mm
BB's for air guns (NOT airsoft) only come in one size .175 commonly referred to as .177 caliber. If you want to know about airsoft BB's then you need to put the question in the "Airsoft category."
6mm
probably not... the bb size has to be the same caliber as the bb gun. the airsoft bb is also made of plastic so it would probably shatter inside of the barrel because it is too light.
The most common size for BB bullets, particularly in airsoft and BB guns, is 6mm in diameter. This size is widely used in recreational shooting and is compatible with most airsoft guns. In traditional BB guns, lead or steel BBs typically measure 4.5mm in diameter. Each size serves different purposes depending on the type of gun and intended use.
yes, most green airsoft bb's are biodigradable
No. Metal bb's will not work in airsoft guns.
It's uses size .12 for best results.
bb
Yes, the only difference is their weight.
A bb (as in a bb gun) is a small plastic pellet fired out of a gun (sometimes known as airsoft guns)
If you are talking about airsoft bb's, then yes. Most bb's fall between .12 grams and .30 grams, and a 20 gram airsoft bb wouldn't work well.
almost every gun for airsoft uses a 6mm (milimeter) BB. try that.