When it comes to realism, gas blowback is as real as it gets in the airsoft world. Gas blowback pistols are powered by compressed gas. This gives them an instantaneous trigger response. The blowback action causes the slide to shoot back with each shot which adds recoil, just like a real pistol. These guns are made to be very close replicas to real firearms. For this reason they are extensively used by law enforcement, special operations, and military personnel as training tools.