 Despite an official Wii Zapper expansion released by Nintendo, some gun peripherals have been shown by third parties.The first of these appeared in early April, when video game retailer GameStop listed a "Wii Blaster" peripheral on its website, with a release date of May 1, 2007.Originally listed without a specified manufacturer, the Wii Blaster had been speculated to be the Zapper, but has since been indicated to be produced by third party accessories manufacturer Core Gamer.