Serious Gas handgun upgrade and maintenance involves much more than just the use of more powerful gases or booster kit. You want to ensure that FPS is not increased at the expense of reliability. You want to be able to shoot without recharging gas every several rounds. And you want your gun to last long. Practical Gas Airsoft Pistols Upgrade & Maintenance tells you what needs to be replaced or reinforced to sustain the high impact brought by gases such as Top Gas and the like. It teaches you how to keep your gun at peak performance, and how to keep it in good shape. And the best of all, it provides you with tips and tricks that are practical and affordable.