Airsoft Firearms come in all different models, makes and styles from lots of different manufacturers.
Basically if there is a real world gun out there you can guaruntee there is an Airsoft Firearms version of it available somewhere.
You have 3 different power sources for Airsoft Firearms
Below is a selection of the type of Airsoft Firearms that are available.
Airsoft Pistol (Usually around 270 -350 fps gas or electric)
Airsoft Assualt Rifle (Usually around 350 fps gas or electric)
Airsoft Support Weapon (Usually around 350 fps usually electric)
Airsoft Sniper Rifle (Usually around 350 - 500 fps Spring Gas or electric)