The KJ Works M9 Vertec GBB gas pistol is primarily constructed from metal. Only the pistol grip panels are made of plastic, which enhances handling comfort. The pistol is powered by Green Gas, which is filled into the magazine through the fill valve located at the bottom. The gas pressure provides the BB with a solid 1-joule muzzle energy and a crisp recoil thanks to the KJW blowback system.
