Uses pre-charged natural air eliminating temperature and pressure variation problems. Complete peace of mind over usable pressure remaining due to each of two detachable cylinders having its front pressure gauge analog or digital. Sealing is inside the bottle and not outside in the pistol. If seal is broken you have only to use another bottle. Sufficient air for a guaranteed 200 shots when charged to 200 bar. Unique low pressure lock intercepts the loading gate to stop inconsistent velocity on later shots should any seal fail whilst shooting.