The Modular Open RF Architecture’s (MORA) core objective is to logically decompose radio frequency (RF) systems for efficiency, flexibility, reusability, and scalability while enabling management, health monitoring, and sharing of raw and/or processed data. MORA extends the Army’s Vehicular Integration for C4ISR/EW Interoperability (VICTORY) architecture. MORA was introduced to the GVSETS community in 2015 at version 1.0 of the specification, and has matured with the help of community, industry, and academia partners to its current version 2.3. This paper discusses the current state of the MORA specification and how it has evolved beyond its initial topology to encompass the entirety of the RF chain in an open and modular fashion. In addition, this paper will describe the purpose of MORA, the objectives of its development, its foundation, and the basic concepts and core features.