What is the command relationship? What are the supporting documents/references (MCO, SECNAVINST, etc..)?
Marine Corps Order 4000.XX of August 11, 2005 refers. See link:
Paragraph 4a(2)(c) states:
“Commanding General Marine Corps Systems Command (CG MARCORSYSCOM) acquires ground weapons systems, equipment, and information technology including National Security System for the Marine Corps in accordance with references (a), (d), and (e) (SECNAVINST 5400.15A, DoD 5000.1, and SECNAVINST 5000.2D respectively.) CG MARCORSYSCOM acts as the Milestone Decision Authority (MDA) for those acquisition programs where such authority has been re-delegated by Assistant Secretary of the Navy, Research, Development and Acquisition (ASN(RDA)). MARCORSYSCOM Program Managers (PM) are the single point of accountability for timely and effective acquisition and sustainment of weapons systems, equipment, and information technology including National Security System throughout the life cycle. MARCORSYSCOM PM for Ammunition executes the program management functions of effective acquisition and sustainment throughout the munitions life cycle, as well as those functions normally assigned to Marine Corps Logistics Command (MARCORLOGCOM) in paragraph 4a(2)(b) above. The CG MARCORSYSCOM is an enabling commander for optimizing materiel readiness, reducing the logistical footprint, minimizing total ownership costs of the operational forces and for program level Total Life cycle Management (TLCM) of Marine Corps ground equipment, information technology including National Security System and ground weapon systems. CG MARCORSYSCOM reports directly to ASN(RDA) for acquisition matters and to Commandant of the Marine Corps (CMC) (Assistant CMC) for program level TLCM and the execution of non-development, non-acquisition logistics and operating forces support responsibilities. MARCORSYSCOM is an Echelon 2 activity reporting to CMC. CG MARCORSYSCOM, as the principal advisor to ASN(RDA) on acquisition and program level TLCM, coordinates with the DC, I&L, to ensure alignment with USMC enterprise level TLCM.”