The Fusion Combo Airgun is one amazingly quiet airgun and this is because of Umarex’s SilenceAir five-chamber noise dampening system, which is permanently fixed to the muzzle. This single-shot pellet rifle takes advantage of CO2 valve technology, which also makes it incredibly quiet. The synthetic stock is comfortable and lightweight when you shoulder it and peer through the included 4x32 scope. Just drop in two 12 gram CO2 capsules in the cylinder, load a pellet, cycle the smooth bolt and quietly place pellets through the same hole of your target at 10 meters. Amazingly Accurate. Incredibly Quiet.