BAK Industries: Buy BAKFlip MX4 or Revolver X2 and Get $50 Back or Husky Liners GearBox February 24, 2017February 24, 2017 David Ayers Leave a comment Via mail-in rebate. Qualifying purchases must be made in the USA or Canada from February 17 to March 17, 2017. Click image for printable form and complete details!