The S12 Shotgun is fairly effective against the zombies, with 10 shells in a magazine, and being semi-automatic. It is a 1 hit kill until round 12, ironically enough. While mostly disliked by players who enjoy shotguns like the Remington 870[my personal favorite] and the KSG, the S12 serves a much different role. The other BOll shotguns are great for training, when your running around and someone gets in your way, with a Remington 870 or KSG it is easy to clear them with one or two shells instead of attempting to dodge around them or change direction, people that try to use the S12 like this are disappointed and often trade it for a different shotgun or different gun altogether but if you use the S12 like you would an assault rifle or SMG and shoot into the hoard its high ROF and healthy c