When it comes to realism, gas blowback is as real as it gets in the airsoft gun world. Airsoft gas blowback pistols are powered by compressed gas which gives them an instantaneous trigger response. The blowback action causes the slide to shoot back with each shot and that adds recoil, just like a real pistol. These airsoft guns are made to be very close replicas to real firearms, which is why they are extensively used by law enforcement, special operations, and military personnel as training tools.
Learn more about Blowback vs. Non-Blowback airsoft guns in our Airsoft Buyers Guide.