Helpful tip for beginner gas blowback users as CL Project Design shows how one can properly charge a gas magazine. To effectively fill a gas magazine, hold the gas bottle upside down. This allows the liquid gas to be drawn into the magazine more easily. Press the nozzle firmly into the magazine and hold it for about 10 seconds to let the gas settle. Repeat this process until the magazine is full, as indicated by a small amount of gas escaping around the nozzle.