They don't
Low powered guns shoudl use .12 gram or other lighter bbs, medium AEGS shoudl use 20 or slightly higher. High powered spring guns should use 28+ grams bbs.
an Automatic Electric Gun or AEG is am airsoft gun that runs off a battery to fire bbs instead of being hand cocked or powered by a compressed gas.
Generally, airsoft guns are divided into two according to its source of power to propel BBs, which are spring (mechanical)or pressurized gas. Automatic Electric Gun (AEG) or Automatic Electric Pistol (AEP) uses spring as the power to propel BBs. AEG/AEP use a motor to pull back the piston, compressing the spring. The motor itself use battery/ies to work.
No, if you are talking about bb's for a BB gun. The BB's for an air rifle or BB gun wont even stay in a Magazine for an airsoft gun. Airsoft BB's are 6mm, air rifle bb's are much smaller. You will ruin an airsoft gun with the smaller metal bbs. But you can get aluminum 6mm pellets for an airsoft gun.
It is a pistol that fires BBs or Pellets that are powered by Air or C02, NOT Gunpowder. Some countries consider them Firearms some do not consider them firearms.
You have do be more specific about the problem. The battery power might not be reaching the gearbox, the hop-up might not be aligned properly, or the spring in the mag could have broke and no BBs would reach the gun altogether.
Your best bet is to look at airsoft products. Most of them are powered electrically, but there are plenty that use co2 or green gas to operate.
You search 'how do you calculate BBS' on google
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Searchlight BBS was created in 1985.
The population of BBS Kraftfahrzeugtechnik is 1,200.