Commercial Technology, coupled with open standards and the US Army’s VICTORY Standard present a strong opportunity to create Open Systems Common Electronics Architectures. The paper describes the COTS approach, the relevant open standards, application for ground combat platforms, and references the previously presented intra-vehicle network reference architecture. A candidate LRU, the TPUIII, is presented as a first step towards a common building block in HBCT. Next steps for common architecture development and analysis versus VICTORY are provided.