The Ripper SMG/Assault Rifle — part of the Devastation DLC pack — is available early for Call of Duty: Ghosts Season Pass holders on PlayStation 4. If you have a Season Pass for Call of Duty: Ghosts on PlayStation 4, you will find the Ripper under Submachine Guns.

The Ripper may appear locked if your PlayStation 4 is not set as your primary console. Follow the steps to activate your PlayStation 4 as your primary console.
  1. Go to Settings and select PSN.
  2. Go to Activate as Your Primary PS4 and select Activate.
After activating your PlayStation 4 as your primary console, you will need to restore your license and re-download your Season Pass:
  1. Go to Settings and select PSN.
  2. Select Restore License.
  3. Go to Libraries and select Call of Duty: Ghosts.
  4. Go to Related Items and select My Add-ons.
  5. Select Download the Season Pass.
  6. Launch Call of Duty: Ghosts once the download is complete.