Airsoft guns are not dangerous whatsoever, besides getting shot in the eye, which all you have to do is wear glasses or buy some eye protection goggles. In fact, I just had an airsoft war with many types of different airsoft guns, and the only thing that hurts the most is if you get shot in the fingers or some body part that isn't covered in clothes. Tell your mom that this isn't very dangerous, and you deserve to have an airsoft gun.