Nerf blasters under the "CS" or "ECS" systems are only compatible with Streamline Darts, Elite Darts, or Elite Suction Darts. The only exception to this rule are some clip system blasters released under the N-Strike Elite series, like the Retaliator and Rampage. Clips have a spring which pushes the darts into the blaster's chamber when the chamber is open. Once the chamber is closed, the trigger can be pulled and the dart can be fired. Once the chamber opens again, it allows the clip's spring to push a new dart into the firing position.