MSI-DEFENCE SYSTEMS US, LLC

MSI-DEFENCE SYSTEMS US, LLC specializes in the design, integration, and sustainment of precision ordnance systems and electro-optic targeting solutions for U.S. military platforms. The company’s core expertise lies in the manufacturing and modification of small arms, ordnance accessories, and gun mount systems—including the MK38 Mod 4 machine gun system and MK 88 Mod 4 gun mount—alongside electro-optic sight interfaces such as the EOS and EOSS units. Their technical proficiency spans mechanical integration, fire control system interoperability, and ruggedized component manufacturing compliant with military environmental and performance standards. A key differentiator is their ability to deliver sole-source spare parts and system upgrades under time-sensitive defense logistics frameworks, ensuring operational continuity for naval and ground-based weapon platforms. The contractor maintains a consistent relationship with the Department of Defense, delivering mission-critical hardware to naval surface warfare and ordnance commands. Work performed includes direct support to naval surface systems, particularly through the Naval Surface Warfare Center, Indian Head Division, where they provide maintenance and replenishment of gun system components under established basic ordering agreements. Their engagements are characterized by recurring, high-reliability supply chains for weapon system sustainment. Industry focus centers on NAICS 332994 for small arms and ordnance manufacturing, with secondary capabilities in 334511 for electro-optical and navigation instrumentation and 333310 for commercial and service machinery adapted for defense use. This positions MSI-DEFENCE SYSTEMS as a niche supplier within the defense ordnance lifecycle, bridging precision manufacturing with tactical system integration. As a 2L entity based in Rock Hill, South Carolina, the company operates as a specialized manufacturer without federal certifications. Its geographic footprint is concentrated in the southeastern defense industrial base, serving as a responsive, non-traditional supplier for DoD ordnance and electro-optic modernization initiatives.