-SNIP-For airsoft Gas cost more to work because of the mags and then the Gun.M4/M16s mags are the most common in the world so if you get a gun and is in a squad try to get some thing that uses them. electric uses a motor to pull back the piston and the spring then lets go and fires the BB spring is like that just does't have the motor. Gas I don't know how it works there is more than one way of doing it.Also for your second GET A PISTOL with low FPS and draw it when they are close. Read up on laws and find community's in your area.
Hey i like airsoft 2 :p do u use with or without blowbackgas?
Boelens lives in my timezone so I assume he's in the US.