NS have said that the TPM, while an important part of the armoury, will no longer be the key weapon and focus of development. The Z Inter Phase cannon (or Zip) is seen as having more room for growth and development.
TPM-5 is said to have been cancelled with development only continuing of the next generation TPM-4 and TPM-3 families. The Zip cannon will receive an upgrade within the next couple of years.
