KWA's lineup of Gas Blowback pistols are the best and recommended for all your sidearm needs, whether to serve as a reliable secondary weapon or your CQB primary weapon, no one tops KWA in performance and power. Gas blowback pistols are powered off Green Gas, a propane mixture, that is usually filled into the magazine allowing for semi-automatic, and in some models fully automatic fire. As well the advantages of gas blowback pistols is the blowback slide that racks the slide back and forth to simulate the cycling process as real pistols often do. On top of that KWA utilizes their patented NS2 system blowback system, for one of the most efficient in gas consumption to FPS ratio. Combine by that by their excellent service and support center, this is the way airsoft should be played.