The latest bolt system from SP the Shocker® XLS bolt system elevates the Shocker®’s performance to a whole new level. By taking advantage of the longer marker platform, the Shocker® XLS bolt system has a larger internal volume resulting in even lower operating pressure of 145psi. The lower operating pressure allows the Shocker® XLS to provide a smoother, quieter shot than previous generations of Shocker® while maintaining the same level of effciency. When paired with refinements to the regulator design – the XLS bolt system has a faster recharge and greater consistency at full rate of fire then ever before.