WE G18 sold with an official Umarex magazine. Propane powered. Several components have been upgraded: the rear sights are from a WE upgrade kit, an improved grip texture has been installed, the inner barrel has been replaced, but most importantly, the trigger has been changed. It has a shorter and lighter trigger pull, making semi-automatic firing easier and faster, for those times when you don't want to or can't fire in full auto. It is recommended to use dry gas to preserve the weapon's longevity and to manually lubricate it from time to time with silicone oil. WE replicas are known for their modularity and need to be upgraded out the box; they are quite easy to upgrade, and they are compatible with far more aftermarket parts than Umarex replicas, among others.