This is a sources sought notice for market research only, not a request for quotes or proposals. The requirement is for five Safran SecureSync 2400 Master Clock and Time Synchronization chassis with associated antennas, mounting, surge protection, grounding, cabling, and SFP modules. The system must support microsecond-level NTP/PTP timing, multi-GNSS constellations, an OCXO oscillator for holdover, and interface with existing WSMR tactical telemetry networks. Performance is intended for the White Sands Missile Range (WSMR) environment. No budget or submission timeline is provided.