For the ultimate in high-performance sports action, it\\\'s Nerf or Nothin\\\'! Build and customize for any mission or battle with the Nerf N-Strike Modulus system of blasters, upgrade kits, gear, accessories, and darts. Battlers can upgrade their firepower when they combine the Nerf Modulus Mediator Stock with the Nerf Modulus Mediator Core (sold separately). With the entire Modulus system, more than 1000 combinations are possible! (Blasters, upgrade kits, and accessories each sold separately). Add the Mediator Stock to the Mediator Core to upgrade firepower for Nerf Modulus battles The Mediator Stock has a double-barrel, hammer-action blaster hidden inside it The stock has a clip on the back side so battlers can attach it to belts to use as a holster The Mediator Stock is part of the Mediator Series, which includes a core, stock, and barrel that can be combined to create the Mediator XL blaster (core, stock, and barrel each sold separately)