Gas guns ressemble more a fire arm than an electric gun in the sound, looks more like an explosion (the sudden release of gas). My guess ^^

And not only that, but the mechanics involved with a GBBs operation mimic the real steel counterparts greatly, not only with the blowback of the slide to chamber a new round making is truly semi automatic, but the way the guns operate with the springs, trigger bars, sears, leaf springs, etc.... all the way to the little nub that comes up with the follower spring that kicks up the slide catch when the mag is empty locking the slide open. MUCH more realistic than an AEG.

GBB rulez! ^^ (for wall hangers at least)

I dont know about you, but Ive been able to game GBBs very effectively, especially my PTP. This thing is just deadly.

At TTAC3, GBB's hold an advantage to rifles.