The SCA stock is a great way to make your marker look and feel more realistic, while also improving its balance. This stock contains and conceals a 13 cubic inch HPA tank that can be used with a Flexi-Air rear plug to completely remove any external gas lines or ASAs. Having an inline platform with a tank built into the stock makes your marker feel more realistic and also helps to balance your marker, making it easier to use for long periods of time. Adding on to the comfort, this stock is adjustable, meaning no matter what your build it can accommodate and give you the perfect feel.